Aero Precision M4E1 Stripped Lower Receiver

Aero Precision M4E1 Stripped Lower Receiver

The M4E1 represents a thoughtful approach to AR-15 lower receiver design. Machined from 7075-T6 forged aluminum, it delivers the refined appearance of a billet receiver while maintaining the strength and reliability of a forged platform.

Key Features

Enhanced Design Elements:

• Integrated Trigger Guard — Eliminates the weak points found in pinned trigger guards, creating a more rigid platform that resists damage during assembly and use
• Upper Tension Screw — Allows you to fine-tune the fit between upper and lower receivers for a custom, tight connection
• Threaded Takedown Pin Detent Recess — Uses a simple 4-40 set screw to secure the detent spring, eliminating the frustration of launching small parts across your workspace
• Increased Magwell Flare — Speeds up magazine changes and improves handling efficiency
• Threaded Bolt Catch Pin — Included for straightforward installation without risk of damaging the anodized finish

Specifications

• Material: 7075-T6 forged aluminum
• Finish: Anodized Black
• Compatibility: All mil-spec AR-15 components and magazines
• Weight: 8.61 oz
• Safety Selector: Marked and milled for short-throw selectors; works with standard selectors
• Markings: "Cal Multi" and "M4-" designation with serial number

What You Need to Complete Your Build

This is a stripped lower receiver. You'll need to source a lower parts kit, buffer tube, and stock to complete your AR-15. The thoughtful engineering here makes assembly straightforward, even for first-time builders.