Aero Precision M4E1 Apar600002C Lower Strp Fde

The Aero Precision M4E1 lower receiver strips delivers billet-quality aesthetics without the billet price tag. Machined from 7075-T6 forged aluminum and finished in Magpul FDE Cerakote, this AR15 lower is built for the serious home builder who wants a rifle platform that looks refined and handles the demands of the range or field. Every detail—from the integrated trigger guard to the threaded bolt catch pin—reflects Aero's focus on making assembly easier and your finished rifle more durable.

What sets the M4E1 apart is its thoughtful engineering. The integrated trigger guard eliminates the weak points of pinned designs, giving you a stronger, more rigid foundation for your build. The threaded takedown pin detent recess means you'll never chase a spring across your workbench again—just use the included 4-40 set screw for secure, repeatable installation. An upper tension screw lets you dial in a perfect fit between upper and lower, and the flared magwell speeds up magazine changes when seconds count.

Compatible with all standard AR15 parts and magazines, the M4E1 works equally well as a precision rifle platform or a duty-ready build. The lower is milled to accept short-throw safety selectors, though it runs flawlessly with standard controls. At 8.61 ounces, it won't burden your carry or handling. Whether you're assembling your first AR or your tenth, this lower strips away the frustration from assembly while delivering the finished look of a custom shop gun.

Key Features

• Integrated trigger guard for superior rigidity and durability
• Threaded bolt catch roll pin (included) for simplified, finish-safe installation
• Upper tension screw allows fine-tuning fit with any standard AR15 upper
• Threaded takedown pin detent recess—use a 4-40 set screw, no more lost springs
• Increased magwell flare for faster, more reliable magazine changes
• Milled and marked for short-throw safety selectors; standard selectors also compatible
• Forged 7075-T6 aluminum with Magpul FDE Cerakote finish

Specifications

Frequently Asked Questions

Will this AR15 lower work with my existing upper receiver?

Yes. The M4E1 is fully compatible with all standard AR15 upper receivers and magazines. The upper tension screw lets you fine-tune the fit for a tight, rattle-free connection with your specific upper.

What tools do I need to assemble this lower?

You'll need a 1/16" hex key for assembly. The included threaded bolt catch roll pin and 4-40 set screw for the takedown pin detent are the main installation features; no roll pin punch required for the bolt catch.

Can I use a standard safety selector with this lower?

Yes. The lower is milled and marked to accept short-throw safety selectors, but standard selectors are fully compatible and will function normally.

What comes in the box?

The M4E1 lower receiver strip includes a threaded bolt catch roll pin. Additional AR15 components (trigger group, grip, safety selector, springs, detents) are sold separately.