Guns Modify Drop In Complete Bolt Set for Mauri M4 MWS GBB

Guns Modify Drop In Complete Bolt Set for Mauri M4 MWS GBB Metal Construction Design For Upgrade the Original Parts More Durable Robust as well as it featuring a roller for smoother cycling. Suitable For Tokyo Marui MWS M4 Series Airsoft Gas Blow Back GBB Rifle