Looking for the best Gas Piston System. Look no further! Black Rifle Arms has developed the most innovated Gas Piston Systems
Aero Precision USA M5 .308 Stripped Lower Receiver helps you build a big-bore AR from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface.
Don’t forget to BUY an Aero Precision M5 .308 Lower Parts Kit. Aero Precisions LPK is specifically designed to work with the M5 Lower Receiver and includes custom take-down and pivot pins as well as an extended magazine catch button.