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

Overview

If you are building a dedicated 9mm pistol or carbine, the ar9 80% lower fire/safe marked – 9mm – billet gives you a solid foundation without the paperwork. This billet lower is machined from 6061-T6 aluminum and comes with crisp, laser-etched fire and safe markings. It is designed specifically for 9mm Glock-style magazines, so you get reliable feeding and a clean look. Whether you are assembling your first AR-style build or adding another caliber to the safe, this lower keeps the process straightforward and the build quality high.

We have run several of these lowers in test builds, and the billet construction provides a tight fit with most upper receivers. The 80% blank means you will finish the trigger pocket and pin holes yourself, which is ideal if you want a firearm that is not serialized under federal law. Just pair it with a quality jig and router, and you will have a functional lower ready for range time.

Features & Specs

The ar9 80% lower fire/safe marked – 9mm – billet is built around the needs of a 9mm platform. The magazine well is machined to accept Glock 9mm magazines without modification, and the bolt catch is positioned to work with standard 9mm bolts. Here are the key specs and features you can expect:

• Billet 6061-T6 aluminum construction with a hard-coat anodized finish for durability and corrosion resistance
• Laser-etched fire and safe markings on both sides of the lower for clear selector indication
• Dedicated 9mm magazine well designed for Glock-style magazines (Glock 17, 19, 26, and aftermarket equivalents)
• Integrated bolt catch cutout compatible with standard 9mm AR bolts and catch assemblies
• Accepts standard AR-15 lower parts kits, triggers, grips, and buffer tubes (note: a 9mm buffer and heavy buffer spring are recommended for reliable cycling)

Because this is an 80% lower, the trigger pocket, hammer pin holes, and trigger pin holes are not fully machined. You will need to complete these cuts using a dedicated jig and end mill or router. The fire/safe markings are indexed so you can align your selector correctly after finishing.

Who It’s For

This ar9 80% lower fire/safe marked – 9mm – billet is a great choice for the home builder who wants a lightweight, compact platform in 9mm. It suits shooters who already have Glock magazines and want to consolidate their magazine inventory, as well as those building a pistol-caliber carbine for competition, plinking, or home defense. Because it is an 80% blank, it is also ideal for anyone who prefers to complete their own firearm without involving an FFL for the lower transfer. If you have basic tooling experience and a steady hand, you can turn this blank into a functional lower in an afternoon.

• DIY builders who enjoy finishing their own receivers at home
• Shooters who want a dedicated 9mm lower that uses common Glock magazines
• Competition shooters looking for a lightweight, cost-effective build platform
• Anyone who wants a compact pistol or carbine without the paperwork of a serialized receiver

Shipping & FFL

Because this is an 80% lower receiver, it is not considered a firearm under federal law and does not require transfer through an FFL dealer. We can ship it directly to your doorstep with no additional paperwork or fees. However, once you complete the machining and assemble it into a functional firearm, you are responsible for complying with all state and local laws regarding possession and use. Some states and localities have restrictions on 80% receivers, so please verify your local regulations before ordering. We do not accept returns on machined or modified 80% lowers, so inspect the blank upon arrival. No signature is required for delivery, but we recommend using a secure shipping address.

• No FFL transfer needed for the 80% blank – ships directly to you
• Check your state and local laws before purchasing; some jurisdictions restrict 80% receivers
• Once finished, the completed lower must comply with all applicable laws in your area