GHK 265mm Inner Barrel For M4 GBB Rifle Airsoft Guns (GBB Spec)

GHK 265mm Inner Barrel For M4 GBB Rifle Airsoft Guns (GBB Spec) Copper Construction GHK original inner barrel with GBB spec Suitable For GHK M4 Gas Blow Back GBB Rifle Airsoft Guns Compatible With 10 inch Length Outer Barrel Length: 265mm