About this product

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

Overview

This AR9 80% lower fire/safe marked – 9mm – billet is designed for builders seeking a dedicated 9mm platform that maintains the familiar AR-15 ergonomics with a true 9mm bolt catch profile. Machined from billet 7075-T6 aluminum, this lower receiver blank requires final machining of the fire control cavity, trigger pin holes, and safety selector channels before assembly. The fire/safe markings are laser-engraved at the factory, providing clear, permanent selector indicators that meet ATF compliance requirements for non-firearm receivers. This AR9 80% lower fire/safe marked – 9mm – billet is compatible with standard AR-15 LPK components and accepts Glock-style 9mm magazines when paired with the appropriate upper receiver and magazine catch setup.

Features & Specs

Manufactured by AR9 as a precision billet component, this lower receiver blank offers tight tolerances and a clean aesthetic. The fire/safe markings are positioned for standard 90-degree safety selectors, and the receiver is machined to accept commercially available 9mm bolt catches without modification. The billet construction provides increased material density compared to forged receivers, resulting in a stiffer platform that can better withstand the cyclic forces of blowback-operated 9mm systems.

• Machined from 7075-T6 aluminum billet with hard-coat anodized finish in black
• Factory engraved fire/safe markings meet ATF compliance for non-firearm receiver blanks
• Designed for 9mm Glock-style magazine compatibility with standard AR-15 fire control groups

• Reinforced bolt catch pocket to accommodate 9mm bolt catch geometry without additional fitting
• Integral trigger guard machined as part of the billet receiver for added strength
• Accepts standard AR-15 buffer tube assemblies and pistol brace adapters

• Manufacturer: AR9
• Category: Parts
• Material: 7075-T6 billet aluminum, Type III hard-coat anodized

Who It’s For

This AR9 80% lower fire/safe marked – 9mm – billet is intended for experienced firearm builders who possess the tooling and knowledge required to complete a receiver blank. It is suited for hobbyists constructing a dedicated 9mm pistol or carbine for range use, competition shooting, or personal defense training. The AR9 80% lower fire/safe marked – 9mm – billet provides a solid foundation for a blowback-operated 9mm build that shares manual of arms with standard AR-15 platforms. Individuals who already own jigs and router setups for 80% lowers will find this receiver compatible with standard AR-15 lower completion procedures, with the exception of the 9mm-specific bolt catch requirements.

Shipping & FFL

This product is classified as a non-firearm receiver blank and does not require transfer through a Federal Firearms License (FFL) dealer. It may be shipped directly to your residence in most states that do not have specific restrictions on 80% lowers. However, purchasers are responsible for verifying their local and state laws regarding the possession and completion of receiver blanks. This AR9 80% lower fire/safe marked – 9mm – billet is not a finished firearm and cannot be used as a complete receiver without additional machining. By purchasing this product, you acknowledge that you are compliant with all applicable federal, state, and local regulations. We recommend consulting with a legal professional if you have any questions regarding the completion or ownership of this product. No FFL transfer is required at the time of purchase.