Sons of Liberty Gun Works M4LOWERLFTA5BRAVO, Complete Lower Receiver, Semi-automatic, 223 Remington/556NATO, Anodized Finish, Black, B5 Bravo Stock, BCM B5 Grip, Liberty Fighting Trigger, Aluminum Enhanced Trigger Guard, Vltor A5 Buffer System with A5H2 and Green Spring, Roll Mark May Vary Based on Product Availability M4LOWERLFTA5BRAVO