The Radical Firearms Mil-Spec Forged AR-15 Complete Lower Receiver with M4 Stock is a fully assembled lower for AR-15 builds (brand part no. RF01522). Radical Firearms forges the receiver from 7075-T6 aluminum and finishes it in Type III Class 2 hardcoat anodizing. It arrives with a MIL-STD trigger group, a carbine buffer and spring, a six-position buffer tube, an M4-style stock and a pistol grip, so it is ready to pair with a compatible AR-15 upper. It makes a clean starting point for a new rifle build or a replacement lower.

Key Specifications

• The receiver is a 7075-T6 aluminum forging built to mil-spec, a material known for strength and durability.
• The finish is Type III Class 2 hardcoat anodizing, which resists corrosion, wear and abrasion.
• The lower is forged and stamped with the Radical Firearms marking.
• It is a complete lower assembly with factory-installed MIL-STD internal components.
• The MIL-STD trigger group gives consistent trigger operation.
• The buffer tube is a MIL-STD six-position tube that adjusts the length of pull.
• A carbine buffer and spring are installed to support smooth cycling.
• The stock is an M4-style stock, lightweight and practical for most rifle builds.
• The pistol grip is an M4-style grip for ergonomic control.
• It is designed to pair with standard AR-15 upper receivers.

Frequently Asked Questions

Does the lower come assembled? Yes. It arrives fully assembled with MIL-STD internal components, a trigger group, a carbine buffer and spring, a six-position buffer tube, an M4 stock and a pistol grip.

What will it work with? Radical Firearms designed it for compatibility with standard AR-15 uppers.

How is the receiver made? It is a 7075-T6 forging finished in Type III Class 2 hardcoat anodizing.

Buy the Radical Firearms Mil-Spec Forged AR-15 Complete Lower Receiver

A forged 7075-T6 lower with the trigger group, buffer system, stock and grip already installed saves time on a new build. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR15 lowers while you are here.