The AR9 80% Lower Fire/Safe Marked – 9mm – Billet comes complete with essential parts as described: AR9 80% Lower Fire/Safe Marked – 9mm – Billet Overview This AR9 80% lower fire/safe marked – 9mm – billet component is a precision-machined platform designed for builders who require a dedicated 9mm lower receiver with clearly engraved fire and safe selector markings. Crafted from 7075-T6 billet aluminum, this lower starts as an unfinished 80% receiver, meaning it requires final machining of the fire control pocket and trigger pin holes before installation. The billet construction ensures a tighter dimensional tolerance compared to forged receivers, reducing slop between upper and lower assemblies. The fire/safe markings are laser-etched into the aluminum after anodizing, providing permanent readability without paint fill. This part is compatible with standard AR15 LPK components, though the 9mm-specific bolt catch profile is recommended for reliable last-round hold-open functionality. Features & Specs Manufactured by AR9, this 80% lower falls under the Parts category and includes the following engineered specifications: Material: 7075-T6 billet aluminum with hardcoat Type III Class 2 anodized finish for corrosion resistance Markings: Fire (F) and Safe (S) engravings located on both sides of the selector pocket, laser-etched post-anodize Compatibility: Accepts 9mm Glock-style or Colt-style magazines with appropriate ejector modification; uses standard AR15 buffer tube and pistol grip threads Wall thickness: Increased sidewall thickness at the rear takedown pin boss for enhanced structural integrity under blowback operation Pocket dimensions: Pre-machined to 80% completion; trigger pocket measures 1.235 inches deep requiring jig-guided milling to reach full depth of 1.485 inches Who It’s For This AR9 80% lower fire/safe marked – 9mm – billet is intended for DIY firearm builders who possess the necessary machining tools (drill press, router, or mill) and an AR9-specific 80% lower jig. It suits shooters who want a dedicated 9mm pistol or carbine platform without purchasing a complete firearm, allowing customization of trigger, grip, stock, and barrel length. The billet design appeals to those who prioritize precision fit over cost savings, as billet receivers typically exhibit straighter feed ramp alignment and tighter upper receiver interface. Builders experienced with 80% lower completion will appreciate the pre-marked fire/safe indicators that eliminate the need for post-machining engraving services. This lower is not recommended for first-time 80% builders due to the tighter pocket tolerances of billet material. Shipping & FFL As an 80% lower receiver, this component is not classified as a firearm by the ATF and does not require transfer through a Federal Firearms License (FFL) dealer. It may be shipped directly to your residential or business address in all states where 80% lowers are legally permissible. However, check your state and local laws regarding unfinished receiver possession, as certain jurisdictions (California, New York, New Jersey, Connecticut, Washington, and others) impose restrictions. Once you complete the milling process and the lower becomes functional, you must comply with all applicable federal, state, and local regulations regarding serialization and transfer. AR9 LLC assumes no liability for improper machining or legal noncompliance. By purchasing, you confirm you are not prohibited from possessing firearms under federal law.

No. This product is a part or accessory and does not require an FFL for purchase or shipping.

While AR9 80% Lower Fire/Safe Marked – 9mm – Billet is legal in most states, always verify your local laws before placing an order. We comply with all state regulations.

In most cases, yes — Glock-compatible frames are designed to accept Glock OEM and compatible magazines. Always confirm fitment in the product details.

That depends on your state’s concealed carry laws. Once properly serialized and registered, carrying may be allowed under state law.

We ship all over the USA within 1–3 business days. You will receive tracking once shipped. Delivery times vary by carrier and region.