Strong, Basic Mil-Spec Receiver Ready For Your Next Custom Build

Due to demand far outpacing supply, we are unable to accept new orders for Aero Lower Receivers at this time. We are in daily contact with the manufacturer and will resume taking orders on as supply catches up. Please note that current backorders will not be cancelled.

Stripped, small pin, semi-auto lower receiver is precision machined from a durable, 7075 T6 aluminum forging. Stamped “Cal Multi,” this versatile mil-spec receiver can be the foundation for rifle builds on 5.56/.223, 6.5mm, 6.8mm, 300 AAC Blackout, 9mm Luger, or other chamberings that fit the standard AR-15 receiver. Holes, inletting and pin locations have been cut to final dimensions and accept standard AR-15 magazines and components. Clearly stamped safe/fire switch position indicators ensure that you can easily identify the service state of the rifle.