GHK M4A1 Hop-Up

Maple Leaf Hop-Up for GHK M4

●With "Hot Shot" hop rubber 70 degree for GHK GBB Hop chamber series
●Dual adjustable system, user can adjust the hop from the original outter barrel
Or adjust the fix screw from loading chamber with M1.5 allen key (just like WE / VFC GBB series)
●The hop chamber also fit with some VFC M4/AR15 GBB series
●with GHK GBB HOP Chamber tensioner