- Made in Taiwan
- Suitable for :

• Zparts Viper M4 Steel Bolt Carrier
• Zparts Viper VI-46 Steel Bolt Carrier

- Material : Aluminum Alloy w/ Full CNC Machining
- Coated with hard anodizing in MIL-STD
- Piston bore diameter: 19mm

* Adjustable initial speed and clear positioning
* Recommended to use gas magazine
* (M3 Screw) Recommended fastening torque 1.96 N.m
* Please use torque wrench and threadlocker
* Can be used with universal screwdriver (Z-TOOL-002)
* The position of negative pressure part is adjusted too far forward or too far back will result in poor function.