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5/8″-18UNF Threaded Unit
Flex Reg Hajimoto Configurations
Rated 4.00 out of 5$209.00 – $220.00Price range: $209.00 through $220.00Select optionsNOTE: 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 – 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. 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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370cc/.37L CE 5/8″ Threaded
370cc/.37L/22.5ci Carbon Fiber 4500PSI Tank
$220.00Select optionsIntroducing a Hajimoto Productions Exclusive offer!
- Shaves almost a full pound of weight off your G2 or G30.
- 22.5ci/370cc/.37L CE Certified CF Tank.
- 5/8”-18UNF Threaded so Stock Gauntlet Regulators will thread directly to this bottle.
Installs on the Gauntlet 2 with minor tank shroud modifications, and the bottle shroud slides right over the carbon fiber cylinder.
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 is a 22.5ci / 370cc carbon fiber 4500psi max fill cylinder.
The diameter of the tank is 54-55mm across so a modification to the forearm is required on a Gauntlet 1. I 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.
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Sale!NEW MODEL
WestHunter WHT 4-16×44 FFP Scope
Select options$240.00Original price was: $240.00.$230.00Current price is: $230.00.The WHT Tactical First Focal Plane 4-16×44 Rifle Scope
Lighter, shorter, clearer glass and greater turret ranges of 60MOA over the previous HD 4-16×44 model
Package includes:
- Choice of Fixed Scope Rings (Picatinny/Weaver or Dovetail/High/Low) Use the NOTES section to communicate Picatinny/Dovetail/High or Low rings
- Scope
- Sun Shade
- Front and rear flip up lens covers
- Large Magnification Wheel (Removable)
Optional adjustable height scope rings are available
Features
- Click value for Elevation/Windage is 1/10 MIL, excellent shockproof performance, handles recoil of a .300 Win Magnum.
- Fully multi-coated high transmission glass increases light transmission, providing sharp, bright images.
- Featuring capped quick-reset turrets with stretch lockdown, no tool adjustable with MIL crisp audible clicks that allow quick reset to zero after sighting in.
- Made of anodized 6061 aircraft-grade aluminum alloy, sealed nitrogen-charged tube, shockproof, waterproof, and fogproof.
- This optic has passed very strict WestHunter performance testing.
Specifications listed below
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Sale!
0.5L/500cc CE Certified CF Tank (M18)
0.50L Carbon Fiber Tank 4500PSI (M18)
$230.00 – $240.00Price range: $230.00 through $240.00Select options -
Sale!
0.5L/500cc CE Certified CF Tank (5/8″)
0.50L Carbon Fiber Tank 4500PSI (5/8″)
$230.00 – $240.00Price range: $230.00 through $240.00Select optionsHalf a liter of air, right here!
0.5L/500cc CE Certified CF Tank
Tank weight is 19.4 oz
5/8″ – 18UNF Threaded -
DonnyFL EMPEROR V3 Moderator
Emperor 2 x 11 inch
$239.99Select optionsTHIS IS AN AIRGUN ONLY PART

Introducing the largest DonnyFL suppressor catered to the big bore guns.
Overall length 11 inches and weighs in at 1 lb.
This thing is built like a tank to tame those power hungry shooters.
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Sale!NEW MODEL
WestHunter WHT 6-24×44 FFP Scope
Select options$325.00Original price was: $325.00.$260.00Current price is: $260.00.The WHT Tactical First Focal Plane 6-24×44 Rifle Scope
Do not confuse this optic with the less robust Westhunter HD 6-24×50 Scope
Package includes:
- Choice of Fixed Scope Rings (Picatinny/Weaver or Dovetail/High/Low) Use the NOTES section to communicate Picatinny/Dovetail/High or Low rings
- Scope
- Honeycomb sunshade/diffuser
- Front and rear flip-up lens covers
- Illuminated reticle battery
- Lens Cloth
Features
- Shorter, lighter and brighter than the previous HD model.
- First Focal Plane means reticle and target grow equally in magnification making holder calculations simple.
- Click value for Elevation/Windage is 1/10 MIL, excellent shockproof performance, handles recoil of a .300 Win Magnum.
- Illuminated etched reticle with six levels of brightness.
- Fully multi-coated high transmission glass increases light transmission, providing sharp, bright images.
- Featuring capped quick-reset turrets with stretch lockdown, no tool adjustable with MIL crisp audible clicks that allow quick reset to zero after sighting in.
- Made of anodized 6061 aircraft-grade aluminum alloy, sealed nitrogen-charged tube, shockproof, waterproof, and fog proof.
- Superior WHT image clarity makes this a slam dunk when it comes to value for the dollar.
Specifications listed below
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Sale!
0.7L/700cc CE Certified CF Tank
0.70L Carbon Fiber Tank 4500PSI
Select options$390.00Original price was: $390.00.$280.00Current 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
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Sold out!
Flex Reg on 18ci/295cc/.29L CE Certified CF Tank
Power Flex Combo 18.3ci Carbon Fiber 4500PSI
Select options$339.00Original price was: $339.00.$295.00Current price is: $295.00.Introducing a Hajimoto Productions Exclusive offering!
18ci/295cc/.29L CE Certified CF TankFits the Gauntlet 2 without any modifications.
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. An 18.3ci carbon fiber 4500PSI cylinder with externally adjustable Ninja Flex Reg for your Umarex Gauntlet! The massive volume of air afforded you is mind-blowing.
The diameter of the tank is 54-55mm across so a modification to the forearm is required if you desire to continue to use the Gauntlets tank shroud. 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.
Gauntlet Bottle Shroud Mod
Please see the examples provided in the accompanying photos.
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. Please be careful if you have accessories on any of the MLok openings as the screws or MLok fasteners may scratch the tank when the shroud is slid forward or back.
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!.
The cylinder’s outside dimension is slightly larger than the stock aluminum tank so my standard HP Barrel Band does not fit. You will need to use the HP Barrel Band CFT version
Regulator is Made in the USA! The Power Flex Combo is set to either of the two Gauntlet configurations. Simply select the proper configuration. Power Flex Combo Configuration For .177/.22 Cal Flex Reg set to 700 to 1500PSI
Power Flex Combo Configuration For .25 Cal Flex Reg set to 1600 to 2400PSI
DO NOT USE Power Flex Combo Configuration For .25 CONFIG on .177 or .22 they are not capable of handling the pressures. Because of practical limitations, regulator output will be +/- 50PSI (3.5bar) within the requested output.
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500cc CF Tank with Adjustable Reg
Flex Reg RTI Version & Tank
$310.00 – $350.00Price range: $310.00 through $350.00Select optionsFlex 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.
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Sale!
TD 5-30X56 FFP 34mm W/Zero Stop
WestHunter TD 5-30X56 SFIR FFP Scope
Select options$440.00Original price was: $440.00.$351.00Current price is: $351.00.The Westhunter TD 5-30X56 SFIR FFP
Package includes:
- Scope
- 1 set of 34mm Picatinny Scope Rings
- Sunshade
- Large focus wheel.
- Front and rear flip-up lens covers
- Illuminated reticle battery
- Lens Cloth
Features
- First Focal Plane means reticle and target grow equally in magnification making holder calculations simple.
- Massive 30x Magnification
- Incredibly large 56mm objective lens
- As close as 10 yards on the focus
- Zero Stop Turret.
- Click value for Elevation/Windage is 1/10 MIL, excellent shockproof performance, handles recoil of a .300 Win Magnum.
- Illuminated etched reticle with six levels of brightness.
- Fully multi-coated high transmission glass increases light transmission, providing sharp, bright images.
- Featuring quick-reset turrets with stretch lockdown, no tool adjustable with MIL crisp audible clicks that allow quick reset to zero after sighting in.
- Made of anodized 6061 aircraft-grade aluminum alloy, sealed nitrogen-charged tube, shockproof, waterproof, and fog proof.
- Superior TD image clarity makes this a slam dunk when it comes to value for the dollar.
Here is a link to instructions for the ZERO STOP FEATURE
Specifications listed below
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Sale!
Flex reg and 22.5ci/370cc/.37L CE Certified CF Tank
Power Flex Combo 22.5ci Carbon Fiber 4500PSI
$390.00 – $400.00Price range: $390.00 through $400.00Select optionsIntroducing a Hajimoto Productions Exclusive offer!
22.5ci/370cc/.37L CE Certified CF Tank (Available in matte or glossy finish)
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.

























