T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP H+ Retrofit Kit for GHK AR Series (455mm) Category_Piston Kit which is also manufactured by

which is also manufactured by Knight's Armament Co

so nothing more is needed when you applying to your gun

Provide more stable and durable standard for your pistol

- Solid fill structure at magazine release and trigger guard area

：AW-M4-05

T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP H+ Retrofit Kit for GHK AR Series (455mm) Category_Piston Kit which is also manufactured byT N. T. Studio APS X HOP UP SYSTEM HOP UP H+ Retrofit Kit for GHK AR Series (455mm) Features : Simplify the original complex components. The inner barrel can be used T N. T. System all series of precision Air cushion inner barrel (O D 8. 5mm) H+ inner barrel(O D 9. 95mm), has been changed to a general specifications , to rid itself of special specifications. Improve the original innerbarrel rotation problems , improve the stability of shooting. T N.