About this product

Premium Fire/Safe Marked Billet 80% Lower Assembly

For the serious builder who demands precise engineering and functional aesthetics, the premium fire/safe marked billet 80% lower assembly represents the ideal foundation for a custom AR-platform pistol or rifle. Machined from solid 7075-T6 aluminum billet, this lower receiver offers the strength and dimensional accuracy required for a reliable build, while the laser-etched fire/safe markings provide clear, professional-grade selector indicators. This is not a generic blank; it is a purpose-built component for the discerning enthusiast who values both performance and visual clarity.

Overview

This premium fire/safe marked billet 80% lower assembly is manufactured to mil-spec dimensions with enhanced billet geometry. The receiver is fully machined, requiring only the completion of the trigger pocket and fire control group holes to become a functional, serialized-ready lower. The fire/safe markings are deeply laser-engraved and filled for high visibility, ensuring unambiguous selector position identification. The billet construction eliminates casting porosity, delivering a denser, stronger receiver that resists flex under heavy use. Every example is T6 tempered and hard coat anodized in black for long-term corrosion resistance.

Features & Specs

• Billet 7075-T6 Aluminum Construction: Machined from a solid billet block rather than cast, providing superior grain structure, higher tensile strength, and a cleaner internal finish compared to forged receivers.
• Laser-Engraved Fire/Safe Markings: Permanent, high-contrast selector markings that will not wear or fade with use. Marked in standard AR-15 configuration for compatibility with mil-spec selector switches.
• 80% Completion State: All external surfaces, buffer tube threads, trigger guard, magazine well, and takedown pin holes are fully machined. The fire control pocket and selector detent channel are pre-drilled but require final machining to accept standard FCG components.

Who It Is For

This premium fire/safe marked billet 80% lower assembly is built for the advanced home builder who prioritizes material quality and correct markings. It is ideal for individuals who want a lower receiver that looks complete and professional from the start, without the ambiguous blank look of unmarked lowers. The billet design appeals to those who appreciate the tighter tolerances and enhanced stiffness of a machined receiver, particularly for precision builds or competition rifles. This is not a beginner’s project; it requires access to a drill press, jig, and appropriate tooling to complete the fire control pocket. It is intended for personal fabrication and not for transfer to unlicensed individuals.

Shipping & FFL

Because this product is an 80% lower receiver and not a complete firearm, it is classified as an unfinished component and may be shipped directly to your home address without an FFL transfer. However, you must verify that your local jurisdiction permits ownership of unserialized lower receivers. By purchasing this premium fire/safe marked billet 80% lower assembly, you acknowledge that you are legally eligible to possess firearm components under federal, state, and local law. Once the receiver is machined into a functional state, it becomes a firearm and must comply with all applicable regulations, including serialization requirements if you intend to transfer it. We recommend consulting with your local ATF field office or a qualified firearms attorney before beginning your build. No refunds or returns are accepted on machined or modified components. All sales are final.