AR9 80% Lower Fire/Safe Marked – 9mm – Billet

Overview

This AR9 80% lower fire/safe marked – 9mm – billet is a precision-machined component designed for builders who require a dedicated 9mm platform. Manufactured from 7075-T6 billet aluminum, this lower receiver provides the foundation for a reliable pistol-caliber carbine (PCC) build. The fire/safe markings are engraved to industry-standard specifications, offering clear selector positions. As an 80% lower, it requires final machining to completion, making it suitable for personal fabrication. This is a raw component with no serial number, intended for use in compliance with all applicable federal, state, and local laws.

Features & Specs

This AR9 80% lower fire/safe marked – 9mm – billet is built around the direct-blowback 9mm operating system. The billet construction provides a tight, uniform fit with upper receivers and aftermarket trigger groups. The fire/safe markings are laser-engraved and filled for high visibility in low-light conditions. The lower is compatible with standard AR15 grip and stock components, simplifying the build process.

• Material: 7075-T6 billet aluminum, hard coat anodized black
• Markings: Fire/Safe engraved, semi-auto profile
• Compatibility: Accepts standard AR15 LPK, grip, and buffer tube; uses Colt-pattern 9mm magazines (modification may be required for Glock-pattern lowers)

Who It’s For

This AR9 80% lower fire/safe marked – 9mm – billet is intended for experienced firearm builders who have the tooling and knowledge to complete an 80% lower. It is ideal for those constructing a lightweight, low-recoil PCC for target shooting, competition, or personal defense. Because it is a billet receiver, it offers greater rigidity and tighter tolerances than forged alternatives, making it suitable for builders who prioritize fit and finish. This product is not for those seeking a drop-in solution or for first-time builders without proper equipment.

• Experienced machinists and gun builders
• Competition shooters building a 9mm PCC with specific trigger and stock preferences
• DIY enthusiasts who want a dedicated 9mm lower without a factory serial number

Shipping & FFL

This AR9 80% lower fire/safe marked – 9mm – billet is not a firearm as defined by the Gun Control Act (GCA) of 1968 because it is not yet in a functional state. Therefore, it does not require transfer through a Federal Firearms License (FFL) dealer and can be shipped directly to your residence. Shipment is restricted to the 50 United States. We do not ship to P.O. boxes. Check your local and state laws before purchasing. It is your responsibility to ensure that completing this lower receiver is legal in your jurisdiction. This product is sold as a raw, unfinished component.

• No FFL required for shipment
• Ships via UPS or FedEx ground to street addresses only
• Must be completed in compliance with all local, state, and federal laws