Ninja Reg Rebuild Kit
$22.00 – $23.00Price range: $22.00 through $23.00
This Kit Contains All Of The Most Consumable Parts in a Ninja X Reg, Ninja ProV2, and Flex Variants
The Small section of the piston is 7.90mm in diameter.
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- 1 – User-selectable Burst Disk (1.8k, 3k, 5k, 7.5k
- 2 – Upper Small Piston O-Ring (Small Piston Kit)
- 2 – Upper Large Piston O-Ring (Large Piston Kit)
- 1 – Small Lower Large Piston O-Ring
- 2 – Regulator Bonnet O-Rings
- 1 – Fill port o-ring
- 1 – Piston Lower Ball Seat
It is strongly recommended that you open your egulator to determine which piston size you have. Below is a photo of both common Ninja Piston sizes side by side.
Additional information
| Weight | 2 oz |
|---|---|
| Dimensions | 1.5 × 2 × 1 in |
| Regulator Variant | Standard X Reg Large Piston, Standard X Reg Small Piston, Flex Reg |
| Burst Disc Rating | 1.8K, 3K, 5K, 7.5 |
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Huben Power Dream-Notos/Notos G2 TK with 0.30L, 0.36L, 0.50L CF Tank
Haji-Notos/Notos G2 Power Plant Combo
$265.00 – $365.00Price range: $265.00 through $365.00Select options This product has multiple variants. The options may be chosen on the product pageFits the Umarex Notos and the Notos G2
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 ) 0.3L Long, 0.3L Short, 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.
- Optional Barrel Band fitment available for Stock with OEM suppressor, Hajimoto Notos Modified, or FX Barrel configurations.
- Extremely stable externally adjustable regulator, Output 500psi~3600psi
- Provides over 130 shots.
- Ultra-stable output pressure
- Power Plenum with rotating 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 is achieved on the fly, but power decrease requires degassing the plenum/PCP.
While not 100% required, a barrel band is strongly recommended to carry the weight of the plenum, regulator, and cylinder assembly. This eliminates placing all of the lateral load on a small mechanical connection at the plenum to action interface.
See details below
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5/8″-18UNF Threaded Unit
Flex Reg Hajimoto Configurations
Rated 4.00 out of 5$299.00 – $310.00Price range: $299.00 through $310.00Select options This product has multiple variants. The options may be chosen on the product pageNOTE: THE NINJA FLEX REGULATOR HAS A LIMITED INVENTORY
Ninja Paintballs’ Flex Reg with Custom Gauntlet Configuration.
Say goodbye to only one fixed output pressure!
The user has an 800 – 1000 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. For the Gauntlet, select 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. Please note that the highest output the Flex Regulator can be configured for is 3100 PSI, but we can build it to any number below that. Example, a user wants the maximum output of their Flex regulator to be 2800, we will build the regulator so that the adjustable range of that build is 1800 to 2800PSI.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 RegFlex Reg Configuration For Generation 1 Gauntlet .177/.22 Cal
Stock .177/.22 | 3000/1100PSI Regulator
Flex Reg .177/.22 |3000/600 to 1500PSIFlex Reg Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex Reg .25 | 3000/1500 to 2400PSIFlex Reg Configuration For Generation 2 Gauntlet .22 Cal
Stock .22 | 4500/1900PSI Regulator
Flex Reg .22 | 4500/1500 to 2400PSIFlex Reg Configuration For Generation 2 Gauntlet .25 Cal
Stock .25 | 4500/2100PSI Regulator
Flex Reg .25 | 4500/1500 to 2400PSIFlex Reg Configuration For G30 Cal
Stock .30 | 4500/2800PSI Regulator
Flex Reg .30 | 4500/2100 to 3100PSIComes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!
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Sale!
User adjustable M18 regulator
Huben Power Black Hawk Pro
Select options$150.00Original price was: $150.00.$130.00Current 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.
Works with but is not limited to the following:
Umarex Gauntlets, Skout Evo 30, Skout Evo 25, and Skout Epoch 22FEATURES
- 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~3000psi
- Comes with a standard 8mm quick disconnect male foster fitting for filling.
- Dust caps may be green or black at random.
- The regulator has a high airflow rate, is lightweight, easy to operate, rebuildable, and designed for use with HPA/CO2.
- Please note: When storing high-pressure for a long period of time, creep phenomenon (an increase in output pressure) may occur. After the creep phenomenon occurs, the original output pressure will be restored after one shot.
SKOUT USERS*
This regulator does not have a pin on the top of the regulator. This means EPOCH owners are ok, but EVO cannot use this regulator.
Related products
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For G1 G2 & G30 Variants
Umarex Gauntlet Tune O-ring Kit -NO-RING
$13.00 – $22.00Price range: $13.00 through $22.00Select options This product has multiple variants. The options may be chosen on the product pageHajimoto Productions Tuning O-ring kit for the Gauntlet and Gauntlet 2
Now includes two of my “NO RING” pellet probe seals as HP-1 rather than the typical high wear donut orings.
I have put together the most common o-rings that fail during a tuning session. Most of the stock o-rings for the internals will gouge when the airgun is disassembled, this kit will allow you multiple attempts should any of the o-rings fail. Please note that the .30 caliber uses completely different internal o-rings than all previous Gauntlet Models including the .30 cal exclusive transfer port orings Which will be bagged as TP.
Some of the NO-Ring seals have the leading edge precision ground.

These tapered / precision ground types need to be installed as shown below
(Images are of the .30 caliber NO RING)
You get:
- 2 of pellet probe NO-ring seals.
- 2 sets of barrel o-rings.
- 2 sets of tank block o-rings.
- 2 of valve body o-rings.
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for .177, .22 and .25 NOT .30
Gauntlet Short Shroud Combo
$130.00 – $215.00Price range: $130.00 through $215.00Select options This product has multiple variants. The options may be chosen on the product page
Part fits Gauntlet 1 or Gauntlet 2 .177, 22 or the .25 caliber but does NOT fit the Gauntlet .30 caliber
Stock baffle spring must be used!
Remember to always order your suppressor one size larger for shrouded barrel PCP’s. DonnyFL Suppressors are sized so the first number is your PCP’s actual caliber and the second number is one size up. So if you owned a .22 caliber Gauntlet, the size you would select is .22/.25. If you had a .25 you would choose the .25/.30.If Your Gauntlet is:
- .177 Get a .177/.22 Supressor
- .22 Get a .22/.25 Supressor
- .25 Get a .25/.30 Supressor
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Hajimoto Flex Reg on 22ci Aluminum 3K for the G1
Gauntlet Flex Reg with 22ci Tank – Hajimoto Configurations
$350.00Select options This product has multiple variants. The options may be chosen on the product pageIntroducing 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 1500PSIFlex 22 Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex 22 .25 | 3000/1500 to 2300PSIIf 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.



























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