Premium Fire/Safe Marked Billet 80% Lower Assembly

For the serious builder who values precision and compliance from the start, the Premium Fire/Safe Marked Billet 80% Lower Assembly delivers a foundation engineered for performance. Machined from solid 7075-T6 aluminum billet, this lower receiver blank is designed to meet the exacting standards of custom firearm builders and gunsmiths. The crisp, laser-etched fire/safe markings provide a professional, factory-correct appearance while maintaining the unfinished status required for 80% lower compliance. Whether you are completing a personal build or outfitting a project for a client, this assembly offers the structural integrity and dimensional accuracy expected from premium billet manufacturing.

Overview

This premium fire/safe marked billet 80% lower assembly is a precision-machined component that requires final milling to complete the fire control pocket and trigger pin holes. Constructed from a solid billet of 7075-T6 aluminum, it undergoes a rigorous CNC machining process to ensure consistent wall thickness, true trigger pocket geometry, and proper pin alignment. The fire/safe selector markings are engraved into the receiver body using a high-contrast laser process, ensuring durability that will not wear off through handling or cleaning. Each lower is individually inspected for burrs, sharp edges, and dimensional tolerance before shipment.

Features & Specs

• Machined from 7075-T6 aluminum billet for maximum strength and longevity; hard-coat anodized in black for corrosion resistance and a uniform matte finish.
• Laser-etched fire/safe selector markings are deep, crisp, and permanently bonded to the aluminum surface, meeting commercial marking standards for clarity.
• Precision-machined takedown pin holes, buffer tower threads, and magazine catch recesses are held to +/- 0.001 inch tolerance for seamless compatibility with mil-spec upper receivers and parts kits.

Who It’s For

This premium fire/safe marked billet 80% lower assembly is designed for the experienced home builder, the custom shop gunsmith, and the enthusiast who demands a true billet platform without compromise. It suits individuals who prefer to complete their own receiver using a jig and router or drill press, and who require a professional-grade blank that will hold tight tolerances through the finishing process. It is not intended for first-time builders without proper tooling and knowledge of 80% completion procedures. If you are assembling a precision rifle, a competition build, or a trusted personal defense firearm, this lower provides the rigid foundation necessary for consistent accuracy and reliable function.

Shipping & FFL

This product is an 80% lower receiver blank and is not considered a firearm by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). It may be shipped directly to your residence or business without requiring transfer through a Federal Firearms License (FFL) holder. However, it is your responsibility to verify that possession of unfinished lower receivers is legal in your state, county, and municipality. Once you complete the machining process to create a functional firearm, you may be required to comply with all applicable federal, state, and local laws regarding serialization, registration, and transfer. Premium Firearms assumes no liability for misuse or non-compliance with applicable laws. By purchasing this premium fire/safe marked billet 80% lower assembly, you acknowledge that you are of legal age to possess firearm components and that you will abide by all relevant regulations.