Description
Features:
- 7075 Aluminum
- Black Anodize
- Female 7/8-14 threads
- Male M18x1.5 threads
$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.
Sold out!
Features:
| Weight | 6 oz |
|---|---|
| Dimensions | 2 × 3 × 2 in |
You must be logged in to post a review.
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!
Flex reg and 30ci/500cc/.5L CE Certified CF Tank
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.
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.
Copyright All rights reserved Hajimoto Productions LLC 2026
Proudly powered by WordPress . Theme: multipurpose shop by eDataStyle.All products offered on our website are intended for airgun use only. Federal law prohibits using a product in any way not consistent with its intended use. It is the purchaser's responsibility to know and comply with all applicable state, county, and local laws and ordinances. Dismiss
Reviews
There are no reviews yet.