Billet AR-9 Pistol Lower Receiver

This Billet AR-9 Pistol Lower Receiver is the dedicated, high-quality foundation for building a reliable 9mm AR-style pistol or PCC. Machined from a solid block of 7075-T6 aluminum, it’s designed for shooters who demand a rigid platform that accepts Glock-style magazines. If you’re building a compact, hard-hitting range or competition gun, this lower provides the perfect starting point with superior durability over forged receivers. Miami Shooters Supply ensures your build starts right with this precision-machined component and fast shipping.

Key Features

• CNC-machined from a solid billet of 7075-T6 aerospace aluminum for maximum strength.
• Designed specifically for 9mm caliber and compatibility with Glock-style magazines.
• Features a dedicated, reinforced magazine well for reliable feeding and a clean ejection path.
• Integrated trigger guard is part of the billet design, eliminating a potential failure point.
• Accepts standard Mil-Spec AR-15 pistol grip, trigger, and safety components for easy customization.
• Finished with a Type III Hardcoat Anodizing for exceptional wear and corrosion resistance.

Built For

This receiver is ideal for the builder assembling a dedicated 9mm pistol for USPSA PCC competition, home defense, or a compact, fun-to-shoot range toy. Its billet construction and specific 9mm geometry appeal to those who prioritize absolute reliability and a solid feel in their AR-15 parts selection.

Specifications

• Caliber: 9mm (Designed for Glock-style magazines)
• Material: 7075-T6 Aluminum Billet
• Finish: Mil-Spec Type III Hardcoat Anodize (Black)
• Compatibility: Uses Mil-Spec AR-15 fire control groups, pistol grips, and buffers (requires 9mm-specific buffer system).
• Receiver Type: Stripped Pistol Lower (marked “Pistol” for compliant builds).

FAQ

Does this AR-9 lower work with Colt-style magazines?
No, this particular Billet AR-9 Pistol Lower Receiver is configured specifically for Glock-style magazines, which are widely available and known for their reliability.

What buffer system do I need for a build with this lower?
You will need a 9mm-specific heavy buffer and carbine buffer spring. A standard AR-15 carbine buffer is too light for reliable blowback operation with 9mm.