Description
Don’t forget that we can build you a CGA 320 threaded custom M18 output regulator to suit your needs as well.

$249.99 – $309.99Price range: $249.99 through $309.99
Don’t forget that we can build you a CGA 320 threaded custom M18 output regulator to suit your needs as well.

| Weight | N/A |
|---|---|
| Dimensions | N/A |
| SIZE | 300cc (.3L), 580cc (.58L), 700cc (.7L) |
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DISCONTINUED SEE OUR BLACK HAWK PRO LISTING

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
Flex Reg on 18ci/295cc/.29L CE Certified CF Tank
Introducing a Hajimoto Productions Exclusive offering!
18ci/295cc/.29L CE Certified CF Tank
Fits 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.
Flex reg and 22.5ci/370cc/.37L CE Certified CF Tank
Introducing 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.
Mini 5000PSI face
Ninja Paintballs mini pressure gauge.
Face is black and the dial reads to 5000PSI
Color-coded areas on the pressure gauge dial do not necessarily correspond to the safe operating pressure range of the device on which the gauge is installed. The user must observe the device’s specified maximum pressure limits.
5/8″-18UNF Threaded Unit
NOTE: 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 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!
NINJAMFV
Be sure to check your part against the photos before ordering.
If your oring, fill port internals, or fill port don’t look like the one shown, do not purchase.
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