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

This AR9 80% lower receiver is machined from 7075-T6 billet aluminum and features crisp, permanent Fire/Safe markings on the selector. Designed for builders who demand precision in a dedicated 9mm platform, this lower provides a clean, unfinished surface ready for your finish machining. It offers a streamlined path to a custom PCC without the serialized paperwork of a completed receiver.

Overview

The ar9 80% lower fire/safe marked – 9mm – billet is a non-serialized, unfinished lower receiver intended for personal fabrication. It is cut from solid billet stock and uses a standard AR15 lower parts kit with a 9mm-specific magazine catch. The Fire/Safe engravings are laser-etched to a depth of 0.005 inches and filled with white enamel for high visibility. This lower is compatible with Colt-pattern or Glock-pattern 9mm uppers, depending on the magazine block system you select during your build.

Features & Specs

• Material: 7075-T6 billet aluminum with a hardcoat anodized finish (Type III Class 2)
• Markings: Permanent “FIRE” and “SAFE” engravings on both sides, plus “AR9” and “9mm” caliber designation
• Pocket: 80% complete – trigger pocket, safety selector hole, and hammer pin holes are pre-drilled to 80% depth; fire control group pocket requires final machining

Specifications from the manufacturer confirm this is a Parts category item that meets BATFE guidelines for an unfinished receiver. The billet construction provides a tighter tolerance compared to forged lowers, resulting in a more consistent fit with upper receivers and trigger components. All critical dimensions are held to within 0.001 inch.

Who It’s For

This ar9 80% lower fire/safe marked – 9mm – billet is intended for experienced builders who possess the tooling and knowledge to complete an 80% lower. It suits shooters who want a dedicated 9mm pistol-caliber carbine without the serialized registration process. If you already own a 9mm upper and a standard AR15 lower parts kit, this lower completes the platform. It is not recommended for first-time builders or those without access to a drill press, jig, and end mill.

• For hobbyists building a range-only or competition 9mm carbine
• For shooters who prefer the ergonomics of an AR platform in a pistol caliber
• For those who want to avoid the FFL transfer process for their lower receiver

Shipping & FFL

Because this is an unfinished 80% lower, it is not classified as a firearm by the ATF and does not require transfer through a Federal Firearms License (FFL) dealer. It ships directly to your door with no background check or waiting period. However, once you complete the machining, the lower becomes a firearm under federal law. You are legally prohibited from manufacturing a firearm if you are not allowed to possess one. Check all state and local laws before ordering. No FFL is required for this item, and standard shipping rates apply.

• No FFL transfer needed for purchase
• Ships directly to residential addresses in states where legal
• Verify your local laws regarding 80% receiver possession and completion