Aero Precision M4E1 AR-15, Multi-Cal Stripped Lower Receiver

Build your next AR-15 with confidence using the Aero Precision M4E1 Stripped Lower Receiver—a game-changer in the world of mil-spec lowers. Crafted from 7075-T6 forged aluminum, this lower blends the strength of traditional mil-spec materials with the cutting-edge features of a billet design.

The M4E1 features an integrated trigger guard, threaded bolt catch roll pin, and a flared magwell for smoother reloads and easier assembly. With its multi-caliber designation, it’s perfect for any standard AR-15 build, whether you’re running 5.56 NATO, .223 Rem, or .300 Blackout. The Type III Class 2 hardcoat anodized finish ensures extreme durability and corrosion resistance.

The M4E1 Lower Receiver delivers billet aesthetics in a forged package. It is machined from 7075-T6 aluminum and compatible with all mil-spec AR15 parts. It features an integrated trigger guard, upper tension screw, and an increased magwell flare to aid in quick and efficient magazine changes. Included is a nylon tipped tensioning set screw and threaded bolt catch pin. This model has a black hardcoat anodized finish.

Aero Precision M4E1 Stripped Lower Receiver – AR-15 Multi-Cal | Enhanced Design | Mil-Spec 7075-T6 Aluminum

The Aero Precision M4E1 Stripped Lower Receiver offers the perfect blend of Mil-Spec reliability and modern enhancements for your next AR-15 build. CNC-machined from 7075-T6 forged aluminum, this multi-caliber lower features an integrated trigger guard, threaded bolt catch roll pin, and beefed-up design for increased strength and durability. Compatible with all standard AR-15 upper receivers and lower parts kits.

✅ Key Features for Aero Precision M4E1 AR-15, Multi-Cal Stripped Lower Receiver:

• 7075-T6 Forged Aluminum – Mil-spec strength with enhanced aesthetics

• Billet-Inspired Design – Precision-machined for tighter tolerances

• Integrated Trigger Guard – Increased strength and glove-ready clearance

• Threaded Bolt Catch Roll Pin – Simplifies installation and prevents damage

• Flared Magwell – Quicker magazine changes

• Multi-Caliber Compatibility – Ideal for 5.56 NATO, .223 Rem, and .300 BLK builds

• Mil-Spec Component Ready – Accepts standard AR-15 parts kits and uppers

• Proudly Made in the USA – Backed by Aero Precision’s renowned quality

Also Available:

AR-15 Lower Receivers