BJ TAC Steel Mil-Spec Dust Cover For M4 GBB Airsoft Rifle (5.56/ QPQ Coating)

BJ TAC Steel Mil-Spec Dust Cover For M4 GBB Airsoft Rifle (5.56/ QPQ Coating) Steel Construction Airsoft Dust Cover (QPQ Coating) Engraved "5.56" Marking Suitable For M4 Gas Blow Back GBB Rifle Airsoft Gun