Aero Ar15 M4e1 Complete Lower Bk

The Aero Precision M4E1 Complete Lower Receiver in black is an essential component for any AR-15 or M4 platform build. Designed for law enforcement, military, and civilian shooters, this fully assembled lower receiver provides a precision-machined foundation that withstands real-world conditions. Its ready-to-use configuration allows for quick pairing with any standard upper receiver, making it ideal for building or rebuilding a rifle system efficiently.

Manufactured from 7075-T6 aluminum alloy and finished with a Type III hard-coat anodize, the M4E1 lower receiver offers exceptional durability and corrosion resistance. It features a roll-pin fired control group, an ambidextrous magazine release, and a properly staked castle nut, ensuring reliable functionality over thousands of rounds. The tight tolerances between the upper and lower receivers contribute to improved accuracy and shooter confidence during extended use.

This complete lower assembly is particularly beneficial for law enforcement armories, military supply chains, and civilian shooters seeking a plug-and-play solution. It is compatible with all mil-spec AR-15 and M4 upper receivers, accepting standard magazines, fire control groups, and buffer tube assemblies without the need for additional machining or fitting.