Aero Precision M4E1 Stripped Lower Receiver Flat Dark Earth 5.56 / .223 Rem

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 that challenge much more expensive billet options we have added several functional features to the lower receiver to simplify the assembly process for the at home builder. M4E1 Lower Receiver Improvements: Threaded Bolt Catch Roll Pin -