Aero Precision APAR600001C M4E1 Receiver Multi-Caliber Black Anodized Finish 707

The M4E1 Lower Receiver delivers billet aesthetics in a forged package. It is machined from 7075-T6 aluminum and compatible with all mil-spec AR15 parts. It features an integrated trigger guard, upper tension screw, and an increased magwell flare to aid in quick and efficient magazine changes. Included is a nylon tipped tensioning set screw and threaded bolt catch pin. Rear takedown pin detent hole is threaded for a 4-40 set screw. Threaded Bolt Catch Roll Pin (Included). NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete. Type: Stripped Gun Model: AR-15 Gun Type: AR Platform Caliber: Multi-Caliber Material: 7075 Aluminum Finish: Black Hardcoat Anodized Trigger: None