Description

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

Overview

Build your next pistol-caliber platform with the AR9 80% lower fire/safe marked – 9mm – billet. This precision-machined billet lower is designed specifically for 9mm builds and comes with permanent fire/safe markings for a clean, factory-compliant appearance. As an 80% receiver, it requires final machining and is not a finished firearm, giving you full control over your build while staying within legal compliance. Whether you are starting a dedicated PCC or upgrading an existing platform, this billet lower delivers the rigidity and dimensional accuracy you expect from a modern AR9 component.

Features & Specs

Machined from 6061-T6 billet aluminum, this AR9 80% lower fire/safe marked – 9mm – billet is built for strength and longevity. The fire/safe markings are laser-engraved before anodizing, ensuring they remain visible through years of use. The lower is cut to accept standard AR15 trigger groups and grip hardware, with a dedicated 9mm magazine well designed for Colt or Glock pattern magazines depending on your build configuration.

• Material: 6061-T6 billet aluminum with Type III hard coat anodized finish
• Markings: Permanent fire/safe selector engravings (semi-auto profile)
• Compatibility: Accepts standard AR15 LPK, buffer tube, and pistol grip

• Magazine well: 9mm specific – compatible with Colt SMG or Glock pattern mags (block required for Glock)
• Machining: CNC billet construction with precise trigger pocket and pin hole dimensions
• Finish: Black anodized with matte texture for reduced glare and corrosion resistance

• Manufacturer: AR9
• Category: Parts
• Platform: AR9 (9mm Parabellum)

Who It’s For

The AR9 80% lower fire/safe marked – 9mm – billet is intended for experienced builders and hobbyists who want to complete their own 9mm pistol or carbine from a raw receiver. It is ideal for shooters who prefer the ergonomics of an AR platform with the lower recoil and ammunition cost of 9mm. This product is also suitable for competitive shooters building a PCC for USPSA or steel challenge, as well as enthusiasts who appreciate the durability of billet construction over forged alternatives. If you are comfortable with basic machining and want a dedicated 9mm lower that is marked correctly for a fire/safe selector, this component is a solid foundation for your project.

Shipping & FFL

Because this item is an 80% lower receiver, 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 transfer fees required. You must be 18 years or older to purchase. Check your state and local laws before ordering, as some jurisdictions regulate or prohibit the possession of 80% receivers. We do not accept returns on machined components. By purchasing this AR9 80% lower fire/safe marked – 9mm – billet, you confirm that you will complete it in compliance with all applicable laws.