For :
VFC-HK416A5 GBB Gen.2
HK416 GBB Gen.2
HK M27 GBB Gen.2
This pre-assembled full set included :
●T-HOP bucking for VFC-M4 GBB x1
●Precision Double I/D Air-cushion inner barrel 275mm
●VFC-HK416A5 GBB HOP-UP chamber *1
