Aero Precision product has been hard to come by for a while. With that being said, we have plenty of M4E1 uppers and lowers in stock and ready to go for your next build! Check us out on our website or in store to see full inventory of every Aero Precision product we have in stock.

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.