Premium Fire/Safe Marked Billet 80% Lower Assembly

This premium fire/safe marked billet 80% lower assembly is machined from billet 7075-T6 aluminum and is designed for the builder who demands precision from the first cut. Every pocket, pin hole, and trigger slot is cut to tight tolerances, and the lower is marked with clear, laser-engraved fire/safe selectors. This is a raw component that requires finishing to function as a lower receiver.

Overview

The premium fire/safe marked billet 80% lower assembly begins as a solid block of billet aluminum, not a forging. This allows for sharper corners, more consistent wall thickness, and a cleaner overall profile. The 80% completion means the fire control pocket, trigger slot, and selector holes are fully machined, but the trigger pin holes, hammer pin holes, and safety selector detent channel remain undrilled. The fire/safe markings are engraved into the receiver, not painted or applied, so they remain legible after finishing and anodizing.

Features & Specs

• Material: Billet 7075-T6 aluminum with a Type III hard coat anodized finish. The billet construction reduces stress risers and provides a more uniform grain structure compared to forged receivers.
• Markings: Laser-engraved fire (semi-auto pictogram) and safe (safe pictogram) markings on the selector side. No caliber, model, or serial number markings are present, in compliance with 80% receiver guidelines.
• Machining: Fully machined trigger pocket, magazine catch slot, bolt catch recess, and rear takedown pin detent channel. The lower is 0.125-inch thick at the rear takedown lug and uses a standard mil-spec buffer tube thread.

This premium fire/safe marked billet 80% lower assembly is compatible with standard AR-15 LPKs, buffer tubes, and uppers. The billet construction provides a slightly heavier wall thickness than forged lowers, adding approximately 1.5 ounces to the overall weight. The fire/safe markings are positioned for standard selector rotation (90-degree throw) and will align correctly with most aftermarket selectors.

Who It’s For

This lower is for the builder who wants a clean, marked receiver without the hassle of engraving after finishing. The premium fire/safe marked billet 80% lower assembly is designed for experienced home builders who have the tools and knowledge to complete the remaining machining steps: drilling the trigger and hammer pin holes, drilling the safety selector detent channel, and tapping the grip screw hole. It is not suitable for first-time builders unless they have access to a drill press, jig, and appropriate end mills. The billet construction and factory markings make it a good choice for those building a precision or show-grade rifle where aesthetics matter.

Shipping & FFL

This premium fire/safe marked billet 80% lower assembly is not a firearm and is not serialized. It ships directly to your home or business address with no FFL transfer required. No background check, no 4473 form, and no waiting period. Federal law classifies this as a non-firearm component because it is not yet capable of firing a cartridge. However, you must check your state and local laws regarding the possession, completion, and ownership of 80% receivers. Some states impose restrictions on 80% lowers, including serialization requirements or outright bans. By purchasing this item, you certify that you are legally allowed to possess this component in your jurisdiction. We do not ship to restricted areas, and it is your responsibility to know the law in your locality.

All orders are processed within one business day and shipped via USPS Priority Mail or UPS Ground, depending on your location. Signature may be required for deliveries over a certain value. No returns or exchanges on 80% lowers due to the nature of the product.