The M4E1 Lower Receiver delivers billet aesthetics in a forged package. This custom-designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades, this custom-engineered design provides features that challenge much more expensive billet options and simplify the assembly process for the at-home builder.

• Threaded Bolt Catch Roll Pin
• Integrated Trigger Guard
• Upper Tension Screw
• Threaded Takedown Pin Detent Recess
• Increased Magwell Flare
• Marked and milled to accept short-throw safety selectors
• Includes Nylon tipped tensioning set screw and Threaded Bolt Catch Pin

Aero Precision M4E1, Semi-automatic, Stripped Lower Receiver, 223 Remington/556NATO, Anodized Finish, Olive Drab Green APAR600501C