Aero Precision M4E1 PRO Stripped Lower Receiver – Black

Aero Precision M4E1 PRO Stripped Lower Receiver – Black

The Aero Precision M4E1 PRO Stripped Lower Receiver – Black brings advanced engineering and precision craftsmanship to your next AR-15 build. Forged from 7075-T6 aluminum and CNC-machined to tight tolerances, this stripped lower sets a new standard for strength, modularity, and fit. Its black hardcoat anodized finish meets MIL-A-8625F Type III Class 2 specs for long-lasting durability in any environment.

This lower features integrated pockets for the bolt catch and magazine release, simplifying installation and supporting standard Mil-Spec components. A flared magwell enhances reload speed, while the slightly widened rear takedown pin area ensures a tight, consistent fit with any Mil-Spec upper receiver.

What sets the M4E1 PRO apart is its built-in M-LOK-compatible interface, offering direct accessory attachment at the receiver level—an industry-first innovation. A reinforced trigger guard opening accommodates gloved operation, and the enhanced rigidity built into the lower’s geometry helps reduce flex and improve consistency under recoil.

Weighing just 8.61 oz, the M4E1 PRO offers a lightweight platform without sacrificing strength or stability, making it ideal for duty use, competition builds, or custom rifles where performance is a priority. This lower is fully compatible with all standard AR-15 components and follows strict Mil-Spec 1913 dimensional standards for seamless integration.

• Compatibility: Works with all standard AR-15 upper receivers and components
• Magazine Well: Flared for faster reloads
• Trigger Guard: Reinforced and oversized for gloved use
• Accessory Mounting: Integrated M-LOK slots at the receiver

Proudly made in the USA and backed by Aero Precision’s lifetime warranty, the M4E1 PRO Stripped Lower Receiver is the ideal base for shooters seeking innovation, compatibility, and superior performance in a lightweight package.