Turn your Zelos into a Bottle Gun
IN STOCK AND READY TO GO!!

Click image for details

1. KARMAGEDDON IS HERE!!!!!!!

The NateChrony V2

IS AVAILABLE NOW!

CLICK IMAGE TO BE REDIRECTED

THE HAJI-NOTOS BUILDER

IS AVAILABLE NOW!

BASED ON THE UMAREX NOTOS

CLICK IMAGE TO BE REDIRECTED

THE GAUNTLET TACTICAL CONVERSION KIT

IS AVAILABLE NOW!

CLICK IMAGE TO BE REDIRECTED

Tanks and Regs

Sale!
$135.00 – $140.00
360CC 4.5K PSI M18 Threaded CF Tank
0.36L M18 Thread Carbon Fiber Tank
$135.00 – $140.00
Features
- Lightweight High Pressure Carbon fiber Cylinder
- 360cc/0.36L capacity
- Available in Gloss Or Matte
- 9″ x 2.4″ (228mm x 61.5mm)
- M18 Threaded
Shown Below On the HajiNotos
Select options
$55.00
11.4cc plenum expansion for Avenger
Doux – Avenger Power Plenum
$55.00
AVENGER/LEVIATHAN POWER PLENUM:
- SIZE: 11.4cc
- STACKABLE
- BLACK ANODIZED WITH MATT BLACK GUN COATING
- TYPICAL PERFORMANCE INCREASE IS AROUND 20FT/S WITH NO OTHER MODIFICATIONS.
THIS PLENUM IS NOT DESIGNED TO NOT FIT THE BULL PUP VERSION

INSTALLATION CAN BE MADE USING TYPICAL SNAP RING PLIERS

MADE IN SOUTH AFRICA

Installation video below
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Sale!
$220.00 – $230.00
0.5L/500cc CE Certified CF Tank
0.50L Carbon Fiber Tank 4500PSI
$220.00 – $230.00

Half a liter of air, right here!

0.5L/500cc CE Certified CF Tank
Tank weight is 19.4 oz
Perfect fit for your custom build.

M18x1.5 Threaded

This is the same bottle we use on the TacVenger builds we offer.

Select options
$110.00 – $175.00
PCP Air Compressor Filter 4500psi Oil Water Separator
$110.00 – $175.00

A quality water, oil and odor filter system designed to protect your PCP’s! Consider selecting the combinations that come with the extra-length fill whip so you can stand your filter up and down and still have plenty of slack to connect to your PCP.

Whether you are using a hand pump or a personal compressor it is vitally important that only clean dry air be introduced in your air reservoir.

Made from high-quality aircraft aluminum and is rated for safe use.

Don’t make the mistake of not drying your air as it will destroy regulators as well as your aluminum pressure vessels.

Select options
$274.00
4.5K PSI Ninja Reg on a 18ci/295cc/.29L CE Certified CF Tank
Ninja Reg on 18ci Carbon Fiber Bottle
$274.00

Direct replacement with no modifications required for the Umarex Gauntlet 2 & G30/G30SL!
18ci/295cc/.29L 4500 PSI Carbon Fiber Bottle

Hajimoto is bringing sexy back! Doesn’t that carbon fiber look awesome on there!

Includes Ninja’s HP regulator.
The CF Tank is CE Certified made to ISO 11119-3 standard. They have seamless aluminum alloy 6061 liner wound with high strength Japan-imported carbon fiber and glass fiber reinforced plastic full composite layers and subjected to an autofrettage pressure. This 4500 PSI carbon fiber bottle is 18ci and is absolutely gorgeous on the Gauntlet 1 or Gauntlet 2.

The Gauntlet 1 will need to increase its tank shroud inside diameter to allow the foregrip/tank cover to side over this carbon fiber tank.

Operating Pressure Recommendations

Gauntlet 1:
.177/.22 Stock operating pressure 1100PSI Max Recommended pressure is 1400PSI.
.25 Caliber Stock operating pressure 1900PSI Max Recommended pressure is 2100PSI.

Gauntlet 2:
.22 Stock operating pressure 1900PSI Max Recommended pressure is 2100PSI.
.25 Caliber Stock operating pressure 2100PSI Max Recommended pressure is 2300PSI.

Gauntlet 30/30SL:
Stock operating pressure 2800PSI Max Recommended pressure is 3100PSI.

NINJA REGULATORS ARE MADE IN THE USA!

Select options
Sale!
$359.00 – $369.00
Flex reg and 30ci/500cc/.5L CE Certified CF Tank
Power Flex Combo 30ci/.5L Carbon Fiber 4500PSI
$359.00 – $369.00

Please note that this combo will not fit a Gauntlet or Gauntlet 2 as the tank diameter is larger than the rifle’s tank shroud will allow. This combo is intended for builds that do away with the tank shroud or to be used on other PCP’s that allow for a typical paintball regulator installation.

Introducing a Hajimoto Productions Exclusive offer!

30ci/500cc/.5L CE Certified CF Tank
Newly redesigned unit
Now has a high pressure and low pressure burst discs!

The CF Tank is CE Certified made to ISO 11119-3 standard. They have seamless aluminum alloy 6061 liner wound with high strength Japan-imported carbon fiber and glass fiber reinforced plastic full composite layers and subjected to an autofrettage pressure. This includes a 30ci/500cc/.5L CE Certified 4500PSI cylinder with externally adjustable Ninja Flex Reg for your custom build.

The Power Flex Combo allows the user to externally adjust the regulator output pressure on the fly with an adjustment range of 900PSI!

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Because of practical limitations, regulator output will be +/- 75PSI (3.5bar) within the requested output.

Select options
Sale!
Original price was: $175.00.Current price is: $160.00.
Used as the Haji-Notos Power Plant
Huben Power – Dream-Notos TK
Original price was: $175.00.Current price is: $160.00.
THE TK VALVE ONLY IS CURRENTLY OUT OF STOCK
IF YOU WANT THE POWER PLANT COMBO, WE DO HAVE STOCK
CLICK HERE

Genuine Huben Power Regulator with Power Plenum

This is the Power Plant that we use for our Haji-Notos build. It allows for precise power adjustment allowing the Notos to deliver only the power required for the situation. If you want to shoot pest birds in a barn or feed house, you can dial it back to fly pellets as low as 400 ft/s, or if you are hunting grey squirrels and want to deliver a JSB Hades 15.89 gr at over 750 ft/s you can do that too.

FEATURES
- Externally adjustable Regulator Output 500psi~3600psi
- Ultra-stable output pressure
- Power Plenum with rotatable joint for perfect clocking, locked in place with set screws.
- Standard 8mm quick disconnect male foster fitting adapter for filling.
- Built-in Picatinny Rail Section for Bipod or Tripod Shooting.
- Tank Threads : M18*1.5
- Power Increase on the fly but decrease requires degassing the plenum.
** BE SURE TO READ DETAILS BELOW **
Select options
$21.95
UX 6000PSI GAUGE
Umarex 6K Gauge
$21.95

This is a Replacement 6K Pressure Gauge for the made in Taiwan Gauntlet Regulator.

This gauge will not fit the Ninja Paintball Version

Select options
$150.00
Umarex Zelos Regulator by HubenPower
HubenPower Zelos Regulator
$150.00
- For Umarex Zelos
- Can be installed in 300bar/4500psi tank，Provides pressure reduction function for Umarex Zelos’ 300bar tank, reducing the 300bar/4500psi tank pressure to below 250bar/3625psi
- Installs directly without modification
- Rotary joint design, easy to adjust the position of the pressure gauge and fill nipple.
- Stainless steel material, strong and durable
- The factory set output pressure is approximately 22~24Mpa (3190~3480psi). This is not the final shooting pressure, Do not adjust!. （Do not turn the bottom adjustment knob if you are not sure what you are doing.）
- Umarex Zelos has an internal regulator. When you need to adjust the pressure for actual shooting, adjust the internal Zelos original regulator.
- Please do not adjust the output pressure of this product to more than 250bar (3625 psi)
- Comes equipped with a standard 8mm quick disconnect male foster fitting adapter for filling.
- The regulator has a high air flow rate, lightweight, easy operation, and re-buildable.
- Compatible with Air/CO2.
Select options
Sale!
$265.00 – $365.00
Huben Power Dream-Notos TK with 0.30L, 0.36L, 0.50L CF Tank
Haji-Notos Power Plant Combo
$265.00 – $365.00
Genuine Huben Power Dream-Notos TK mounted on a .30L (300cc) 0.36L (360CC) or .50L (500cc)

A complete Haji-Notos Power Plant Combo. It allows for precise power adjustment allowing the Notos to deliver only the power required for the situation. If you want to shoot pest birds in a barn or feed house, you can dial it back to fly pellets as low as 400 ft/s, or if you are hunting grey squirrels and want to deliver a JSB Hades 15.89 gr at over 750 ft/s you can do that too.

FEATURES
- Includes 0.30L, 0.36l or 0.50L 4500psi Carbon Fiber Bottle in Gloss or Matte Black.
- Optional Barrel Band support to provide structural support for the Power Plant.
- Extremely stable externally adjustable regulator Output 500psi~3600psi
- Provides over 130 shots.
- Ultra-stable output pressure
- Power Plenum with rotatable joint for perfect clocking, locked in place with set screws.
- Standard 8mm quick disconnect male foster fitting adapter for filling.
- Built-in Picatinny Rail Section for Bipod or Tripod Shooting.
- Power Increase on the fly but decrease requires degassing the plenum.
See details below
Select options
Sale!
Original price was: $40.00.Current price is: $23.00.
1/8″ NPT Thread 5000psi WHITE
24MM Mini Gauge 5K (WHITE)
Original price was: $40.00.Current price is: $23.00.

Small 1/8″ threaded 5000psi PCP gauge.

Fits Ninja Paintball Regulators

Select options
$30.00
Small 13ci (213cc) 3000psi
13ci 3K PSI TANK
$30.00

A 3000psi 13ci (213cc) aluminum paintball style tank.
This is an industry standard 5/8″- 18 threaded bottle with a flat bottom.

This is the same bottle installed on the Original Gauntlet 1 in .177, .22 or .25 caliber PCP as shown below.

Airgun is not included

Select options
Sale!
Original price was: $40.00.Current price is: $23.00.
1/8″ NPT Thread 3500psi COLOR
24MM Mini Gauge 3.5K (COLOR)
Original price was: $40.00.Current price is: $23.00.

Small 1/8″ threaded 3500psi PCP gauge.

Fits Ninja Paintball Regulators

Select options
$159.00 – $169.00
5/8″-18UNF Threaded Unit
Flex Reg Hajimoto Configurations
Rated 4.00 out of 5
$159.00 – $169.00

Ninja Paintballs’ Flex Reg with Custom Gauntlet Configuration.
Say goodbye to only one fixed output pressure!
The user has an 800 – 900 psi adjustment swing!
Requires minor forestock modification.
The regulator thread is 5/8-18UNF (Bottle Thread) and Typical Paintball Threads of .825-14 NGO (PCP Thread).

Please note the Flex regulator can be used with any Air, Co2, or Nitrogen driven air gun not just the Gauntlet, providing it has the correct threading.

The Ninja Flex regulator is available in any 900 psi spread to a maximum of 3100 psi output but for the Gauntlet select from the proper configuration.
If you select the Custom Configuration, you will need to use the NOTES above to communicate what you want the maximum output to be.

How to read the below configurations
Example: Flex Reg .22 | 4500/1600 to 2400 psi
Flex Reg .22 = Regulator Type for .22 caliber
4500/ = The bottle’s maximum fill pressure
1600 to 2400 psi = The output range of the Flex Reg

Flex Reg Configuration For Generation 1 Gauntlet .177/.22 Cal
Stock .177/.22 | 3000/1100PSI Regulator
Flex Reg .177/.22 |3000/600 to 1500PSI

Flex Reg Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex Reg .25 | 3000/1500 to 2400PSI

Flex Reg Configuration For Generation 2 Gauntlet .22 Cal
Stock .22 | 4500/1900PSI Regulator
Flex Reg .22 | 4500/1500 to 2400PSI

Flex Reg Configuration For Generation 2 Gauntlet .25 Cal
Stock .25 | 4500/2100PSI Regulator
Flex Reg .25 | 4500/1500 to 2400PSI

Flex Reg Configuration For G30 Cal
Stock .30 | 4500/2800PSI Regulator
Flex Reg .30 | 4500/2100 to 3100PSI

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Select options
$205.00
Hajimoto Flex Reg on 22ci Aluminum 3K for the G1
Gauntlet Flex Reg with 22ci Tank – Hajimoto Configurations
$205.00

Introducing a Hajimoto Productions Exclusive offer!

22ci/360cc/.36L Aluminum Tank 3000PSI
Newly redesigned unit
Now has a high pressure and low pressure burst discs!

Flex 22 Configuration For Generation 1 Gauntlet .177/.22 Cal
Stock .177/.22 | 3000/1100PSI Regulator
Flex 22 .177/.22 |3000/700 to 1500PSI

Flex 22 Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex 22 .25 | 3000/1500 to 2300PSI

If you are looking to add an externally adjustable reg to your Gauntlet 2, take a look at swapping your current fixed reg to the Flex reg found HERE

Installs on the Gauntlet with minor tank shroud modifications. (The Gauntlet 2 is shown to give an idea of what modification needs to happen and that is simply a hole drilled in the bottom of the plastic tank shroud for the fill nipple.

A 22ci aluminum 3000PSI cylinder with externally adjustable Ninja Flex Reg for your Umarex Gauntlet1! The volume of air in these 22ci tanks over the 13ci is mind-blowing!

The diameter of the tank is 54-55mm across so a modification to the forearm is required on a Gauntlet 1. I do offer a tank shroud modification service for Gauntlet 1 owners that can be added to a build or provided as a mail-in service.

The Gauntlet 2 forearm slide right over without any issue. Only one access hole needs to be drilled so the fill port is accessible at the bottom.

Consider picking up our extended foster fill adapter to make coupling and filling a breeze.

The Power Flex Combo allows the user to externally adjust the regulator output pressure on the fly with an adjustment range of 800PSI!

When installing the Flex 22 on the Umarex Gauntlet. Tighten the degassed tank and regulator assembly fully to the rifle, then back it off until the fill port is on the bottom and the gauges are left and right. Now fill the bottle with air and all will tighten up solid. Proper alignment will be achieved before the 360° maximum rotation limit is realized.

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Because of practical limitations, regulator output will be +/- 50PSI (3.5bar) within the requested output.

Select options
$9.95
Burst Disk Two Pack
Regulator Burst Disks 1.8k, 3k, 5k & 7.5k
$9.95
- 1.8k burst disk is used as the low-pressure burst disk on 3k and 4,5k tanks
- 3k burst disk is used as the low-pressure burst disk on 3k and 4,5k tanks
- 5k burst disk is used as the high-pressure burst disk on 3k tanks
- 7.5k burst disk is used as the high-pressure burst disk on 4.5k tanks
Actual burst disk finish may be Black, or Bright depending on availability. The Flex Reg Above is an example of 5K and 7.4K Burst Disks.

The Flex Reg Above is an example of 5K and 7.5K Burst Disks.
Select options
$200.00
Tank Valve ST0031
Saber Tactical Tank Valve
$200.00

Replace your factory tank valve with our larger valve. The large knobs and handle make filling and releasing air a breeze

Select options
$18.50
Umarex Gauntlet Regulator Shim Pak
$18.50
Hajimoto Productions Regulator Shim Kit For Umarex Gauntlet

I have put together a very easy and complete stainless steel shim kit so you can adjust your Gauntlets Regulator output. The shims that I have included give you a wide range of adjustability to mix and match different thicknesses to get the regulator to output exactly what you want. The shim kit comes with easy to follow instructions which guide you through the process as to what shims you need to add to typically achieve my recommendations for each Gauntlet Caliber.

The shim kit contains:
- 2 – #5 Shims.
- 1 – #3 Shim.
- 2 – #2 Shims.
  (Two #2’s = One #4 | Two #5’s = One #10 | One #5 + One #3 = One #8, and so on)
To take a stock G1 .177/.22 from the stock 1100-1050PSI to my recommended 1350-1400PSI you would add two (2) #5 shims (10).
To take a stock G1 .25 from the stock 1900-1950PSI to my recommended 2100-2200PSI you would add one (1) #3 shim (3).
The included two #2 shims are for minor adjustments if you have a finicky regulator.

DETAILED LESSON/EXAMPLE:
Let’s say your .22 Gauntlets regulator only puts out 1300PSI after installing the two #5’s when it should be 1350 to 1400PSI, you would add one #2 for a total of 12 to help get it there. If after the addition of the one #2, you’re still 50psi short so you would pull out the #2 and use the #3 for a total of 13.

Always use a regulator output tester to confirm the output pressure of your regulator. It is the only safe and sure way to properly adjust the pressure of your regulator.

You have to fill and purge so the Belleville washers settle into the new preload. Be sure to slow fill your bottle the first time only to 500PSI and then purge it, fill slowly a second time to 1000, and then purge fill the final time slowly and watch to be sure the reg has settled and does not exceed your target pressure. If it does exceed your target pressure, stop filling, purge and shim less.

If you rapid fill, there is a good chance you will pop your burst disc.
Select options
$21.95
Ninja Regulator Rebuild Kit Part #NINJARBK
$21.95

Ninja Paintball Tank Regulator Replacement Part #NINJARBK – Rebuild Kit for Ninja NON Pro Regulators.

User selectable included burst disc rating (1.8K, 3K, 5K or 7.5K)

Select options
$30.00
Oil Water Separator Cartiridge
$30.00

Replacement / Additional Filter element. This cartridge is for the PCP Air Compressor Filter 4500psi Oil Water Separator we offer. The cartridge has molecular sieve, activated carbon, felt absorbing pads, and dividers installed and ready to go.

Select options
$21.95
Ninja PRO V2 Regulator Rebuild Kit Part #PRORBK
$21.95

Ninja Paintball Tank Regulator Replacement Part #PRORBK – This Rebuild Kit for Ninja Pro V2 Regulators ONLY.

Like the one below:

This rebuild kit is not for the Umarex Gauntlet Stock Regulator.

User selectable included burst disc rating (1.8K, 3K, 5K or 7.5K)

Select options
$30.00
From 7/8″-14 to M18x1.5
Saber Tactical Tank Valve adapter
$30.00

This adapter allows you to convert the threads on our tank valve from 7/8-14 to M18x1.5. The M18x1.5 is common on carbon fiber gun tanks.

Select options
$35.00
Air Venturi Avenger Bottle Conversion Barrel Band
Avenger Bottle Conversion – Barrel Band
$35.00
Available in two sizes:
- Small 59-61.5mm Diameter CF Tank (Typically fits 0.35L (350cc), 0.36L (360cc), 0.42L (420cc), 0.45L (450cc), 0.50L (500cc), & 0.70L (700cc) cylinders)
- Large 62-63mm Diameter CF Tank (Typically fits: 0.38L (380cc), 0.48L (480cc) & 0.58L (580cc) Cylinders)
** YOU MUST MEASURE YOUR CYLINDER TO BE SURE. THE ABOVE ARE TYPICAL SIZES YOURS MAY VARY **

The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to live at the end of the cylinder as shown and has a section of Picatinny rail on the bottom to allow for the attacking of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod used in standing rests.

This Barrel band is specifically designed for an Avenger that has the Doux bottle conversation kit installed and a 60.5mm to 63mm diameter cylinder.
Select options
Sale!
Original price was: $80.00.Current price is: $49.00.
Custom length 47″ Fill Hose
Huben Power – High Pressure Fill Whip
Original price was: $80.00.Current price is: $49.00.
This is a high quality heavy duty high pressure fill whip that Hajimoto Productions had made to 47″, which provides a more reasonable amount of slack and distance when using a portable compressor or fill tanks than other whips on the market.
- Heavy Duty 4500 PSI Assembly.
- Rugged and durable material wrapping.
- Replaceable/Serviceable Stainless Steel threaded high pressure fittings.
- Fits the typical 8mm fill nipple on PCPs and Paintball equipment.
- Available in two configurations: Female on both ends or Male on one Female on the other.
Select options
$4.00
Ninja fill port o’ring
Fill Port O’ring Fits Ninja
$4.00

5 Dura 90 fill port o’rings that are a direct replacement for most Ninja Paintball regulators

Select options
Sale!
Original price was: $150.00.Current price is: $130.00.
User adjustable M18 regulator
Huben Power Black Hawk Pro
Original price was: $150.00.Current price is: $130.00.
The Huben Power Black Hawk Pro is a very stable, high-flow M18 threaded adjustable regulator that allows the user to adjust the output pressure to what is required for the application. The quality of materials and craftsmanship is top-tier. We tested these regulators here at Hajimoto Productions and the standard deviation was so low it was incredible.

FEATURES
- Rotational bonnet allows for exact thread indexing/clocking of the regulator to the PCP.
- Streamline and slim structural design
- Thread: Bottle = M18*1.5 and PCP = G1/2-14
- Max up to 4500psi high-pressure gauge input.
- Regulating output pressure range 500psi~3600psi
- Comes with a standard 8mm quick disconnect male foster fitting adapter for filling.
- Dust caps may randomly be green or black.
- The regulator has a high airflow rate, is lightweight, easily operational, re-buildable, and designed for use with HPA/CO2.
Select options
Sale!
$25.00 – $30.00
With and Without Rail 300cc or 360cc bottle
Notos Bottle Converted – Barrel Band (Stock Barrel)
$25.00 – $30.00
** THIS BARREL BAND IS FOR THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE – CLICK HERE IF YOU HAVE THE HAJIMOTO MODIFIED BARREL**

Available in two sizes and with or without Picatinny rail:
- 300cc/0.3L version
- 360cc/036L version
- Adds the necessary support and rigidity of the long bottle conversion assembly.
The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to live at the end of the cylinder as shown and has a section of Picatinny rail on the bottom to allow for the attaching of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod used in standing rests.

This Barrel band is specifically designed for a Umarex Notos with our HubenPower Dream TK installed with our 300cc or 360cc carbon fiber bottle with stock barrel suppressor installed.
Select options
$24.95
Flex reg white face gauge
Ninja 4K White Face Gauge
$24.95
- 1/8″ NPT THREAD
- 4000PSI DIAL MAX
Select options
Sale!
Original price was: $375.00.Current price is: $330.00.
Flex reg and 22.5ci/370cc/.37L CE Certified CF Tank
Power Flex Combo 22.5ci Carbon Fiber 4500PSI
Original price was: $375.00.Current price is: $330.00.

Introducing a Hajimoto Productions Exclusive offer!

22.5ci/370cc/.37L CE Certified CF Tank
Newly redesigned unit
Now has a high pressure and low pressure burst discs!

Installs on the Gauntlet 2 with minor tank shroud modifications, forearm slides right over the carbon fiber cylinder. Installation video at the bottom of the page.

The CF Tank is CE Certified and made to ISO 11119-3 standard. They have seamless aluminum alloy 6061 liner wound with high strength Japan-imported carbon fiber and glass fiber reinforced plastic full composite layers and subjected to an autofrettage pressure. This included a 22.5ci carbon fiber 4500PSI cylinder with externally adjustable Ninja Flex Reg for your custom build including the Umarex Gauntlet 1 or Gauntlet 2! The massive volume of air in these 22.5ci tanks is mind-blowing!

The diameter of the tank is 54-55mm across so a modification to the forearm is required on a Gauntlet 1. I do offer a tank shroud modification service for Gauntlet 1 owners that can be added to a build or provided as a mail-in service.

Please be careful if you have accessories on any of the M-Lok openings as the screws or MLok fasteners may protrude into the tank area and scratch the tank when the shroud is slid forward or back. We recommend that if you have any MLok accessories installed, you remove them when sliding the shroud on or off. We also recommend covering the brass inserts in the tank shroud with cloth tape to protect your carbon fiber finish.

The Gauntlet 2 forearm slides right over without any issue. Only one access hole needs to be drilled so the fill port is accessible at the bottom. See photo below

Consider picking up our extended foster fill adapter to make coupling and filling a breeze.

The Power Flex Combo allows the user to externally adjust the regulator output pressure on the fly with an adjustment range of 800PSI!

When installing the Flex regulator on the Umarex Gauntlet. Tighten the degassed tank and regulator assembly fully to the rifle, then back it off until the fill port is on the bottom and the gauges are left and right. Now fill the bottle with air and all will tighten up solid. Proper alignment will be achieved before the 360° maximum rotation limit is realized.

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Because of practical limitations, regulator output will be +/- 75PSI to the requested output.

Select options
$249.99 – $309.99
300cc, 580cc or 700cc Bottles
Air Marksman Carbon Fiber Tanks
$249.99 – $309.99
- M18x1.5 neck thread.
- 300cc (.3 Liter), 580cc (.58 Liter), or 700cc (.7 Liter)
- 300 bar fill pressure (4351 PSI)
- Bottle only no regulator or adapters included.
Select options
Sale!
Original price was: $390.00.Current price is: $280.00.
0.7L/700cc CE Certified CF Tank
0.70L Carbon Fiber Tank 4500PSI
Original price was: $390.00.Current price is: $280.00.

0.7L/700cc CE Certified CF Tank
Perfect fit for your custom build.

M18x1.5 Threaded

If you plan to use this bottle with a Gauntlet, you must remove and leave removed, the tank shroud. This bottle cannot use the flex reg as it is threaded M18.

Consider our barrel bands for the 500cc and 700cc bottles on the Gauntlet found HERE

Select options
Sale!
$25.00 – $30.00
With and Without Rail 300cc or 360cc bottle
Notos Bottle Converted – Barrel Band (Modded Barrel)
$25.00 – $30.00
** THIS BARREL BAND IS FOR THE HAJIMOTO MODIFIED BARREL – CLICK HERE IF YOU HAVE THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE**

Available in two sizes and with or without Picatinny rail:
- 300cc/0.3L version
- 360cc/036L version
- Adds the necessary support and rigidity of the long bottle conversion assembly.
The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to live at the end of the cylinder as shown and has a section of Picatinny rail on the bottom to allow for the attaching of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod used in standing rests.

This Barrel band is specifically designed for a Umarex Notos with our HubenPower Dream TK installed with our 300cc or 360cc carbon fiber bottle with a Hajimoto modified barrel installed.
Select options
Sale!
Original price was: $60.00.Current price is: $49.00.
M8, M10, and 1/8″ Threaded Digital Gauge
28mm Digital Pressure Gauge
Original price was: $60.00.Current price is: $49.00.
- 28MM Diameter
- M8, M10, or 1/8″BSP and 1/8″ NPT Threaded versions available
- Display in PSI
- Auto Shut off in 30 secs
- Digital Display 1% Accuracy
- Black Rubber Protective Sleeve
- Working pressure 0-4500psi
- Weight 32g
- Gauge body is made from high-grade brass
Select options
$20.00 – $22.00
Ninja X Reg Rebuild Kit
Ninja Paintball X Reg Rebuild Kit
$20.00 – $22.00
This Kit Contains All Of The Most Consumable Parts in a NINJA X Reg
This Kit is for the Large X-Reg Piston Variant that measures 13.90mm in diameter at the flange of the large piston.
The Small section of the piston is 7.90mm in diameter.
- 1 – User-selectable Burst Disk (1.8k, 3k, 5k, 7.5k
  
  1 – Large Upper Large Piston O-Ring
  
  1 – Small Lower Large Piston O-Ring
  
  2 – Regulator Bonnet O-Rings
  
  1 – Fill port o-ring
Select options
Sale!
Original price was: $45.00.Current price is: $24.00.
8mm Threaded 6000psi mini gauge
24MM Mini Gauge 6K
Original price was: $45.00.Current price is: $24.00.

Small 8mm threaded 6000psi PCP gauge.

Fits Avenger PCP

Select options
$144.95
Ninja X Reg Custom Output Regulator up to 3100psi
Ninja High Pressure 5/8″-18UNF Custom Output Regulator
$144.95
5/8″-18UNF thread can be used on 3000PSI bottle as well. This regulator is built with the ball/pin and spring removed so hot swapping will not be able to happen.

We do include the ball/pin and spring should you happen to have a thin pin depression system capable of actually opening the valve. The only function of this pin/ball is to allow the tank to retain air if it is off of the PCP. This is a paintball thing and should not be used in in HPA.

You should never try to unscrew a high-pressure output paintball-style regulator while it is under pressure. You will destroy the threads as they are not designed to be threaded on and off under load. Degas and then remove the regulator and bottle. Read more in the following article https://hajimotoproductions.com/index.php/2024/11/11/regulator-thread-damage/

This is a direct replacement for the regulator found on the Gauntlets G1, G2 and G30 Caliber
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Take advantage of a quality regulator for your high pressure application.

MADE IN THE USA!
Ninja HP regulator output pressures in increments of 100PSI.
Simply select your desired output pressure from 1100PSI TO 3100PSI
All custom built pressure units will have a +/- 50 psi tolerance.
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Select options
$59.95 – $69.95
Microbore 4500PSI Extension
Ninja Microbore Fill Whip
$59.95 – $69.95
- 30% Lighter and Smaller than standard HPA hoses
- Extremely flexible 30 or 46 inch hose
- 4500 PSI working pressure
- Works with any HPA or CO2 system
- Made in USA
Select options
Sale!
$285.00 – $295.00
Huben Power Adjustable reg on a 300cc/.30L CF Tank
Huben Power on 300cc Carbon Fiber Bottle
$285.00 – $295.00
Direct replacement with no modifications required for the Umarex Gauntlet 2/G30/G30SL other than the fill nipple access hole that is discussed in the video below!
19ci/300cc/.30L 4500 PSI Carbon Fiber Bottle in two finishes.

Hajimoto is bringing sexy back! Doesn’t that carbon fiber look awesome on there!

FEATURES
- Rotational bonnet allows for exact thread indexing/clocking of the regulator to the PCP.
- Stream line and slim structural design
- Thread: Bottle = M18*1.5 and PCP = G1/2-14
- Max up to 4500psi high pressure gauge input.
- Regulating output pressure range 500psi~3600psi
- Comes with standard 8mm quick disconnect male foster fitting adapter for filling.
- Dust caps may be green or black randomly.
- Tank optional finish gloss or matt.
- The regulator has a high air flow rate, is light weight, easily operational, re-buildable, designed for use with HPA/CO2.
Includes the Huben Power Black Hawk Pro regulator.
The CF Tank is CE Certified made to ISO 11119-3 standard. They have seamless aluminum alloy 6061 liner wound with high strength Japan-imported carbon fiber and glass fiber reinforced plastic full composite layers and subjected to an autofrettage pressure. This 4500 PSI carbon fiber bottle is 19ci and is absolutely gorgeous on the Gauntlet.
Select options
$350.00 – $435.00
Huben Power Adjustable reg on a 500cc or 700 CF Tank
Huben Power on 500 or 700cc Carbon Fiber Bottle
$350.00 – $435.00
Extrax Large Air Capacity for the Umarex Gauntlet 2/G30/G30SL !
Available in 500cc or 700cc PSI Carbon Fiber Bottle in two finishes.
The tanks are 4500PSI pressure vessels and much lighter than steel or aluminum tanks.

Hajimoto is bringing sexy back! Doesn’t that carbon fiber look awesome on there!

FEATURES
- Rotational bonnet allows for exact thread indexing/clocking of the regulator to the PCP.
- Stream line and slim structural design
- Thread: Bottle = M18*1.5 and PCP = G1/2-14
- Max up to 4500psi high pressure gauge input.
- Regulating output pressure range 500psi~3600psi (End user is responsible for any pressures beyond the PCP’s stated Maximum)
- Comes with standard 8mm quick disconnect male foster fitting adapter for filling.
- Dust caps may be green or black randomly.
- Tank optional finish gloss or matte.
- The regulator has a high air flow rate, is light weight, easily operational, re-buildable, designed for use with HPA/CO2.
Includes the Huben Power Black Hawk Pro regulator.
The CF Tank is CE Certified made to ISO 11119-3 standard. They have seamless aluminum alloy 6061 liner wound with high strength Japan-imported carbon fiber and glass fiber reinforced plastic full composite layers and subjected to an autofrettage pressure. This 4500 PSI carbon fiber bottle is 500 or 700cc and is absolutely gorgeous on the Gauntlet.
Select options
$21.95
NINJAMFV
Ninja Mini Fill Valve
$21.95
Select options
$310.00 – $350.00
500cc CF Tank with Adjustable Reg
Flex Reg RTI Version & Tank
$310.00 – $350.00

Flex Reg designed and configured specifically for RTI PCP’S such as Prophet, Priest, & Priest 2
This Flex Reg comes paired with a brand-new Carbon fiber 4500PSI tank. The regulator is externally adjustable and has an effective adjustable range of 900PSI (62bar).

Using the slider you select what the maximum output will be and because the regulator has the ability to adjust, you can reduce that maximum output pressure down as much as 900PSI (62bar). You can of course set the pressure anywhere along that 900PSI (62bar) range to suit your tuning requirements. The regulator will not have a pin or ball seal in the bonnet. The tank cannot be removed while under pressure and must be degassed.

Because of practical limitations, regulator max output will be +/- 50PSI (3.5bar) within the requested maximum output.

Comes with a spanner wrench for adjusting the output on the fly.

** This regulator is 5/8″-18UNF threaded and will not fit M18 threaded bottles. This configured Reg is not sold separately.

Select options
$21.95
NINJAOFV
Ninja O-ring Boss Fill Valve
$21.95
Select options
Sale!
$125.00 – $130.00
300CC 4.5K PSI M18 Threaded CF Tank
0.30L M18 Thread Carbon Fiber Tank
$125.00 – $130.00
Features
- Lightweight High Pressure Carbon fiber Cylinder
- 300cc/0.30L capacity
- Available in Gloss Or Matte
- 251mm x 55mm
- M18 Threaded
Shown Below On the HajiNotos
Select options
$154.95 – $155.00
Ninja High Pressure Metric M18 Custom Output
$154.95 – $155.00
Ninja Paintball is beginning to produce these with a polished brass bonnet. We will be forced to only offer the polished brass version once all the black steel bonnets are gone.

We do include the ball/pin and spring should you happen to have a thin pin depression system capable of actually opening the valve. The only function of this pin/ball is to allow the tank to retain air if it is off of the PCP. This is a paintball thing and should not be used in in HPA.

You should never try to unscrew a high-pressure output paintball-style regulator while it is under pressure. You will destroy the threads as they are not designed to be threaded on and off under load. Degas and then remove the regulator and bottle. Read more in the following article https://hajimotoproductions.com/index.php/2024/11/11/regulator-thread-damage/

The ball and spring are provided but removed from the regulator.
```
Take advantage of a quality regulator for your high pressure application.

MADE IN THE USA!
Ninja HP Metric regulator output pressures in increments of 100PSI.
This is a M18 threaded regulator made for M18 threaded bottles.
This will not fit Umarex Gauntlet Bottles which are 5/8"-18 Threaded.
Simply select your desired output pressure from 1100PSI TO 3100PSI
All custom built pressure units will have a +/- 75 psi tolerance.

If you need a low output build with a fixed out of of something between 
300 psi and 1100 psi, the CUSTOM pessure option and provide the output
desired in the notes.

If you are looking for a direct replacement for you Gauntlet2 .22, .25 & .30
You will want the 5/8"-18 Version that is found HERE
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Select options
$179.00
Flex Reg on 13ci Aluminum 3K
Gauntlet Flex Reg with 13ci Tank – Hajimoto Configurations
$179.00

Introducing a Hajimoto Productions Exclusive offer!

13ci/213cc/.21L Aluminum Tank 3000PSI
Newly redesigned unit
Now has a high pressure and low pressure burst discs!

Flex 13 Configuration For Generation 1 Gauntlet .177/.22 Cal
Stock .177/.22 | 3000/1100PSI Regulator
Flex 22 .177/.22 |3000/700 to 1500PSI

Flex 22 Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex 22 .25 | 3000/1600 to 2400PSI

Installs on the Gauntlet with minor tank shroud modifications.

A 13ci aluminum 3000PSI cylinder with externally adjustable Ninja Flex Reg with typical G1/2-14 threads connects to your Umarex Gauntlet 1 or Gauntlet 2 without any modifications!

The diameter of the tank is 54-55mm across so a modification to the forearm is required on a Gauntlet 1. I do offer a tank shroud modification service for Gauntlet 1 owners that can be added to a build or provided as a mail-in service.

The Gauntlet 2 forearm slide right over without any issue. Only one access hole needs to be drilled so the fill port is accessible at the bottom.

Consider picking up our extended foster fill adapter to make coupling and filling a breeze.

The Power Flex Combo allows the user to externally adjust the regulator output pressure on the fly with an adjustment range of 800PSI!

When installing the Flex 13 on the Umarex Gauntlet. Tighten the degassed tank and regulator assembly fully to the rifle, then back it off until the fill port is on the bottom and the gauges are left and right. Now fill the bottle with air and all will tighten up solid. Proper alignment will be achieved before the 360° maximum rotation limit is realized.

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Because of practical limitations, regulator output will be +/- 50PSI (3.5bar) within the requested output.

Select options
Sale!
$360.00 – $419.00
Ninja High Pressure Metric M18 Custom Output with Carbon Fiber Tank
Ninja High Pressure Metric M18 Custom Output with Carbon Fiber Tank
$360.00 – $419.00

Awesome configurations if you don’t care if the Gauntlet bottle shroud stays off. The 700cc on the G30 is beast mode!!!

Ninja Paintball High Pressure Regulator mounted on a quality 0.37L (370 cc), 0.5L (500cc) or 0.7L (700cc) a 4500PSI rated Carbon Fiber Cylinder.

Please be advised that if you use the 370 cc bottle and want to continue to use your stuck bottle shroud, be sure to remove any MSLOT accessories off the tank shroud before sliding it over your new carbon fiber tank as it will scratch it.

Watch my video below that goes over how to modify the brass inserts so they don’t scratch the tank also.

We build the regulator to any custom output pressure in 100 PSI increments from 1100PSI to 3100PSI

All custom built pressure units will have a +/- 75 psi tolerance.

Select options
Sale!
Original price was: $210.00.Current price is: $159.00.
G1 Regulator, 22ci Tank and Barrel Band
Gauntlet 1 Power Bundle
Original price was: $210.00.Current price is: $159.00.
Our Gauntlet 1 Power Bundle! For the Umarex Gauntlet 1 in .177, .22 or .25 Calibers (Bundle is not for the Gauntlet 2)

The Bundle Consists of the following:
- Brand New Ninja Regulator (1100psi, 1300psi, 1900psi, or 2100psi)
- Brand New 22ci 3000psi Aluminum Tank for 70% more air volume!
- Our HP Barrel Band with Picatinny Rail for Flashlight or Bipod.
All for the cost of a regulator alone!

PCP/CALIBER STOCK PRESSURE BOOSTED PRESSURE

G1 .177 1100PSI 1300PSI

G1 .22 1100PSI 1300PSI

G1 .25 1900PSI 2100PSI
Select options
$21.95
Mini 5000PSI face
Ninja Black Mini Gauge
$21.95

Ninja Paintballs mini pressure gauge.

Face is black and the dial reads to 5000PSI

Select options
$50.00
Reg Pressure Tester
HubenPower Regulator Tester
$50.00
High quality HubenPower reg tester.

Features
- Micro threaded activation knob.
- Built in quick action pressure relief knob.
- High pressure gauge to 6000 psi.
Don’t guess what the output of your Gauntlets regulator is, KNOW what it is especially if you are adding shims and need to hit a specific PSI output.

Designed to be used with any Paintball style Regulator that uses the industry-standard G1/2-14 Threads like those shown below.
Select options
Sale!
$25.00 – $35.00
Includes G1, G2, G30, G2SL, & G30SL variants
HP Barrel Band For Umarex Gauntlet
Rated 4.67 out of 5
$25.00 – $35.00

Available in the classic Picatinny rail version or the 15mm thick rail less version.

Versions for Gauntlet 1, Gauntlet 2, Gauntlet 30 as well as the SL Versions!

Select options

Blogs, Articles and News

Top Three – click NEWS for all stories

Hajimoto Productions YouTube Channel:

To see all of my tutorials, modifications, reviews, hunting and pest elimination videos, head over to my YouTube channel. You can get there by clicking on the image to the left or by THIS LINK.

Here on my product site, most products I sell will have the associated video embedded to help you install or better understand the procedure.

About Us

My mission is to share my ideas, products and skill set, with the community in an attempt to foster a creative environment to benefit most.

Through open collaboration, better products and industry-changing trends develop. It is my firm belief that you are witnessing an explosive amount of growth in our industry.

There have been more advances made in the past 5 years than the 15 before that. I am excited about the future and honored to be involved in contributing to the advancement of our sport even if just a little bit.

Follow Us

Please understand Our Business line (413-888-6169) will not process photos or video. Only voice calls or texts are processed. If you call us and there is no answer, please leave a detailed voice message as we always return phone calls that request a callback.

Lastly, if you have images you want to send or share you can use email [email protected] or send them to us through WhatsApp to our business number.

All orders must be placed through our website, no orders are taken over the phone.

Your Host Hajimoto

Hajimoto Productions is an e-commerce company and does not have public access facilities. All orders must be placed through this website as no orders are taken over the phone. We ship to the US as well as any of the US Possessions and Territories like AL, HI, PR, VI, GU, and MP. We also ship to Canada and the UK.

PCP/CALIBER	STOCK PRESSURE	BOOSTED PRESSURE
G1 .177	1100PSI	1300PSI
G1 .22	1100PSI	1300PSI
G1 .25	1900PSI	2100PSI

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Available in two sizes:

** THIS BARREL BAND IS FOR THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE – CLICK HERE IF YOU HAVE THE HAJIMOTO MODIFIED BARREL**

Available in two sizes and with or without Picatinny rail:

** THIS BARREL BAND IS FOR THE HAJIMOTO MODIFIED BARREL – CLICK HERE IF YOU HAVE THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE**

Available in two sizes and with or without Picatinny rail:

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THIS BARREL BAND IS FOR THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE – CLICK HERE IF YOU HAVE THE HAJIMOTO MODIFIED BARREL

THIS BARREL BAND IS FOR THE HAJIMOTO MODIFIED BARREL – CLICK HERE IF YOU HAVE THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE****