GHK AR GBB Retrofit Kit

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

The specially designed HOP chamber can changing different parts to correspond to different types of hand guards.

●T-HOP bucking for T-N.T. GHK-AR HOP-UP chamber.
●Formed integrally, aluminum CNC HOP-UP chamber, more durable !!
●Precision Double I/D Air-cushion inner barrel.
●Pre-assemble by our technicians.

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