Aero Precision M4E1 PRO Stripped Lower Receiver – 5.56/.223 (OD Green)

The Aero Precision M4E1 PRO Stripped Lower Receiver in OD Green delivers enhanced strength, improved ergonomics, and Aero’s signature PRO forging profile for superior durability. Featuring an integrated trigger guard, flared magwell, and threaded bolt catch pin, this receiver offers streamlined assembly and exceptional performance for any premium 5.56/.223 AR build.

FEATURES

• Caliber Compatibility: 5.56 NATO / .223 Remington
• Platform: AR-15 / M4
• Material: 7075-T6 forged aluminum (M4E1 PRO enhanced forging)
• Finish: MIL-SPEC Type III Class 2 hardcoat anodized – OD Green
• Integrated trigger guard for added strength and rigidity
• Enhanced flared magwell for faster reloads
• Threaded bolt catch pin for easier assembly
• Improved rear takedown detent spring channel
• Selector Markings: Safe / Fire
• Compatible with all MIL-SPEC AR-15 upper receivers
• Made in the USA

COMPATIBILITY & FITMENT

Designed to accept standard MIL-SPEC AR-15 components including LPKs, buffer assemblies, stocks, grips, barrels, and bolt carrier groups. For pistol or SBR builds, ensure compliance with NFA regulations and consult a qualified gunsmith where needed.

IMPORTANT NOTES

• FFL Required: Ships only to a valid Federal Firearms License holder.
• All communication for your order will be sent through sales@rra2a.com.
• Customer is responsible for understanding and following federal, state, and local firearm laws.