Premium Fire/Safe Marked Billet 80% Lower Assembly

Designed for the discerning builder who demands both precision and legal compliance, this Premium Fire/Safe Marked Billet 80% Lower Assembly represents the intersection of advanced CNC machining and firearm safety regulation. Constructed from aircraft-grade 7075-T6 aluminum, this billet lower provides the foundational platform for a custom AR-15 build while adhering to the 80% receiver legal framework. Each unit is serial-number ready and features clearly engraved, industry-standard fire and safe selector markings, ensuring your completed build meets both performance and safety expectations.

Overview

The Premium Fire/Safe Marked Billet 80% Lower Assembly is a pre-machined receiver component that requires final milling and drilling to become functional. Manufactured by Premium, this part bridges the gap between raw blank receivers and fully finished lowers. The billet construction process eliminates casting imperfections, delivering a tighter tolerance pocket for trigger groups and a smoother overall finish. The fire/safe markings are laser-engraved into the lower receiver pocket, providing permanent, high-contrast selector indicators. This assembly is not a firearm and may be shipped directly to your door, subject to state and local laws.

Features & Specs

This premium fire/safe marked billet 80% lower assembly is engineered with exacting specifications to support a wide range of calibers and build configurations. The billet forging process yields superior grain flow and structural integrity compared to forged equivalents.

• Material: 7075-T6 aluminum billet – heat-treated to military specification for maximum tensile strength and impact resistance
• Selector markings: Laser-engraved “FIRE” (safe) and “SAFE” (safe) indicators with deep, non-reflective fill for visibility under low-light conditions
• Pocket dimensions: CNC-machined to MIL-SPEC dimensions for drop-in compatibility with all standard AR-15 lower parts kits and trigger groups

The assembly is finished with a Type III Class 2 hard coat anodized finish, providing corrosion resistance and a non-glare surface suitable for tactical or competition use. All critical threaded areas, including the buffer tube and grip screw holes, are pre-tapped and ready for final assembly.

Who It’s For

This premium fire/safe marked billet 80% lower assembly is intended for experienced firearm builders and hobbyists who understand the mechanical and legal requirements of completing an unfinished receiver. It is ideal for those seeking a high-strength lower without the wait or paperwork associated with purchasing a fully serialized firearm. Builders who value precise fire/safe engraving, billet craftsmanship, and the ability to personalize their platform will find this assembly a reliable starting point. This product is not recommended for first-time builders without access to proper jigs, drill presses, and milling equipment.

Shipping & FFL

Because this is an 80% lower receiver (unfinished), it is not considered a firearm by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Accordingly, no Federal Firearms License (FFL) transfer is required for shipment to most states. However, it is the purchaser’s sole responsibility to verify compliance with all local, state, and federal regulations before ordering. This product may not be shipped to California, New York, New Jersey, Connecticut, Hawaii, Massachusetts, Maryland, Washington D.C., or any jurisdiction where unfinished receivers are restricted. By purchasing this premium fire/safe marked billet 80% lower assembly, you certify that you are legally eligible to possess this component and will complete it in accordance with all applicable laws. No returns are accepted on completed or modified receivers.