The Aero Precision AR-15 Gen 2 Stripped Lower Receiver (part no. APAR501101C) is one of the most widely used AR-15 lowers among builders, machined by Aero Precision to tight, consistent tolerances for a clean fit with standard mil-spec parts. Finished in black, the Gen 2 design refines Aero’s original lower geometry for smoother assembly and a comfortable grip angle. It is multi-caliber compatible, so it pairs with virtually any AR-15 pattern upper, and ships stripped so builders can select their own lower parts kit, buffer, and stock.

Key Specifications

• Machined by Aero Precision to the Gen 2 lower receiver specification.
• Finished in black for a classic AR-15 appearance.
• Measures 9.15 inches in overall length.
• Features a flared magwell for faster, more reliable magazine changes.
• Includes an upper tension screw to eliminate upper/lower receiver play.
• Multi-caliber compatible with standard AR-15 pattern uppers.
• Ships as a stripped receiver, ready for your lower parts kit and stock.
• Weighs approximately 0.68 pounds bare.
• Built to Semi-Auto AR-15 pattern specifications.

Frequently Asked Questions

What is different about the Gen 2 design? It refines Aero Precision’s lower geometry for smoother assembly and a more comfortable grip angle compared to earlier designs.

Does this lower ship with parts installed? No, it ships stripped and needs a lower parts kit, buffer, and stock to complete.

What calibers can I build with it? It is multi-caliber compatible and accepts standard AR-15 pattern uppers in the chambering you choose.

Buy the Aero Precision AR-15 Gen 2 Stripped Lower Receiver

Build on a trusted Aero Precision foundation. Browse more AR-15 lower receivers and order from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.