410mm Inner Barrel Version

This amazing full HOP-UP Retrofit kit was especially developed to replace and upgrade the entire GHK-AK GBBR HOP-UP structure. With the ongoing demand for quality upgrade parts for GHK-AK GBBR, T-N.T. STUDIO has developed this HOP-UP chamber which includes all necessary parts including HOP-UP bucking, chamber and inner barrel.

?Add a elastic O-ring rear of HOP-UP chamber, closely integrated with the outer barrel, will be avoid the chamber and adjust ring too tight cause not to adjusting HOP-UP.
?Improve the original "AEG specifications rubber" to "GBB specifications rubber", effective improvement BB feedings issue, airtight and bucking's lip fold inwards problem.

GHK-AK HOP-UP Retrofit kit included :
?T-HOP bucking for T-N.T. GHK-AK HOP-UP chamber.
?Formed integrally, aluminum CNC HOP-UP chamber, more durable !!
?Precision Double I/D Air-cushion inner barrel.

More accurate BBs loading position, effective improve the shooting performance!! Turns your GHK-AR GBBR enhance to next level !!