Maple Leaf CNC Metal Outer Barrel Base For GHK M4 GBB Airsoft Rifle Inner-Barrel-Length-(mm)_195 The rifle typically comes chambered

The rifle typically comes chambered in 5

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Maple Leaf CNC Metal Outer Barrel Base For GHK M4 GBB Airsoft Rifle Inner-Barrel-Length-(mm)_195 The rifle typically comes chamberedKey Feature CNC Metal Construction Airsoft Outer Barrel Base (Lightweight) Design For Replace the Original Airsoft External Parts Suitable For GHK M4 Gas Blow Back GBB Airsoft Rifle