The Aero Precision M4E1 (brand part no. APAR600002C) is an enhanced stripped AR-15 lower receiver machined from forged 7075-T6 aluminum and finished in Flat Dark Earth Cerakote. It delivers a billet-style look in a forged package, built to true mil-spec dimensions so it accepts standard AR-15 parts kits, buffer tubes, and uppers without fitment issues. The enhanced design adds a flared magazine well and integrated features that make it a popular base for a custom precision or duty-style build. It’s the kind of receiver builders reach for when they want billet aesthetics without paying billet prices.

Key Specifications

• Constructed from 7075-T6 aluminum for a strong, lightweight foundation.
• Finished in Flat Dark Earth Cerakote for a durable, corrosion-resistant coating.
• Machined to true mil-spec dimensions, ensuring compatibility with standard AR-15 lower parts kits and buffer tubes.
• Rated multi-caliber, so it works across common AR-15 chamberings.
• Built to the enhanced M4E1 pattern, which billet-style receivers are known for.
• Measures approximately 9 inches in overall length, standard AR-15 sizing.
• Runs a semi-automatic action, standard for AR-15-pattern builds.
• This is a stripped receiver, giving builders full control over trigger, safety, and parts kit selection.

Frequently Asked Questions

Will this fit a standard mil-spec parts kit? Yes, it’s machined to true mil-spec dimensions for standard AR-15 lower parts kits and buffer tubes.

Is this receiver caliber-specific? No, it’s rated multi-caliber and works across common AR-15 chamberings.

Does it come with any internals installed? No, this is a stripped lower receiver, sold without a parts kit or buffer tube.

Buy the Aero Precision M4E1 Enhanced AR-15 Lower Receiver

Start your next build on a receiver that matches mil-spec tolerance with a distinctive FDE Cerakote finish, part of our AR15 lowers selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.