Description

The Aero Precision M4E1 PRO Stripped Lower Receiver is engineered for builders who demand superior strength, precision machining, and streamlined assembly. Featuring Aero’s enhanced M4E1 PRO forging, integrated trigger guard, flared magwell, and threaded bolt catch pin, this lower provides the perfect foundation for a professional-grade 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 – Black
Design: Integrated trigger guard & enhanced receiver geometry
Flared magwell for smoother reloads
Threaded bolt catch pin for easy assembly
Rear takedown detent spring channel for simplified installation
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 (LPKs, buffer tubes, stocks, grips, barrels, BCGs). For AR pistol or SBR configurations, consult a qualified gunsmith and ensure full compliance with NFA regulations and all federal, state, and local laws.

IMPORTANT NOTES

FFL Required: Ships only to a valid Federal Firearms License holder.
All order communication will be sent through sales@rra2a.com.
Customer is responsible for ensuring legality of ownership in their jurisdiction.

Aero Precision M4E1 PRO Stripped Lower Receiver Black