Aero Precision M4E1 Stripped Lower Receiver - Anodized Black

Aero Precision M4E1 Stripped Lower Receiver - Anodized Black

Built for those who demand performance and precision without compromise, the Aero Precision M4E1 Lower Receiver combines billet-level aesthetics with the strength of forged 7075-T6 aluminum—all wrapped in a sleek anodized black finish. Designed to simplify your at-home build while raising the bar on form and function, it’s the ultimate foundation for your AR15 setup.

From its integrated trigger guard to the thoughtfully threaded components that eliminate build frustrations, the M4E1 lower isn’t just another receiver—it’s an intelligently engineered platform ready to anchor your next high-performance rifle.

7075-T6 Forged Aluminum Construction
Delivers superior strength and lightweight durability

Threaded Bolt Catch Roll Pin
Simplifies installation and protects your finish—no hammering, just a hex key

Integrated Trigger Guard
Eliminates the risk of broken tabs and adds structural rigidity

Upper Receiver Tension Screw
Nylon-tipped set screw allows precise fit tuning between upper and lower receivers

Threaded Takedown Pin Detent Recess
Makes spring installation easy and mess-free with a 4-40 set screw

Flared Magwell
Enhances speed and fluidity during magazine changes for tactical readiness

Short-Throw Safety Compatibility
Milled and marked to accept short-throw selectors, while remaining compatible with standard safeties

Specifications

• Material: Machined from 7075-T6 forged aluminum
• Finish: Anodized Black
• Weight: 8.61 oz
• Markings: “Cal Multi” / “M4-” Serial Number Designation
• Compatibility: Works with standard AR15 parts and magazines
• Included: Stripped M4E1 Lower Receiver, nylon-tipped tensioning set screw, threaded bolt catch pin
• Made in America: Yes