MetalTac Airsoft BBs 0.20g 20,000 Round 6mm BBs Airsoft Pellets for airsoft bb guns High quality BBs. Comes with 5,000 rounds per bag. Extremely accurate These BBs are 0.20g (+- 0.01g) and 5.95mm (+- 0.01mm) Perfect BBs to use on expensive AEGs High quality comparable with other expensive brands at a low cost.