RA Tech CNC Steel Bolt Carrier for GHK M4 / M16 GBB Rifle Airsoft Gun (Titanium)

RA Tech CNC Steel Bolt Carrier for GHK M4 / M16 GBB Rifle Airsoft Gun (Titanium) CNC Steel Construction Airsoft Bolt Carrier Design For Upgrade the Original Airsoft Internal Parts (Bolt Carrier) More Durable Suitable For GHK M4/ M16 Series Gas Blow Back GBB Airsoft Rifle