Premium Fire/Safe Marked Billet 80% Lower Assembly

Build your next platform with confidence. The Premium Fire/Safe Marked Billet 80% Lower Assembly delivers the foundation you need for a reliable, custom rifle. Machined from a solid block of 7075-T6 aluminum, this lower receiver is designed for the serious builder who demands precision, durability, and clear marking. As a billet 80% lower, it provides the structural integrity of a fully machined part while giving you the flexibility to complete it to your exact specifications. The fire/safe markings are laser-etched for permanence, ensuring your safety selector functions are unmistakable at a glance.

Overview

This premium fire/safe marked billet 80% lower assembly is the cornerstone of a true custom build. Unlike forged lowers that can exhibit seam lines and variable density, the billet construction starts as a single bar of aluminum, CNC-machined to tight tolerances. The result is a receiver with straight walls, crisp edges, and a consistent material structure. The fire/safe markings are deep, legible, and correctly positioned for standard AR-15 safety selectors. Whether you are completing a lower for the first time or you are an experienced gunsmith, this component offers a clean canvas with the most critical markings already applied.

Features & Specs

The specifications of this premium fire/safe marked billet 80% lower assembly reflect a commitment to quality at every stage. Every dimension is held to mil-spec tolerances, ensuring compatibility with nearly all upper receivers and lower parts kits.

• Constructed from 7075-T6 aluminum, hardcoat anodized in a matte black finish for corrosion resistance and a non-reflective surface.
• Laser-etched fire/safe markings on both sides of the receiver, clear and legible even under low-light conditions.
• Reinforced trigger pocket with a flat-bottom design for consistent trigger engagement and improved reliability with aftermarket triggers.
• Standard takedown pin and pivot pin lug geometry, allowing drop-in fit with mil-spec and most commercial uppers.
• Threaded bolt catch hole and rear takedown pin detent hole, pre-tapped for easy assembly.

This premium fire/safe marked billet 80% lower assembly also features an oversized trigger guard area, accommodating both standard and enhanced trigger guards without modification. The magazine well is beveled for faster, smoother reloads.

Who It's For

This product is intended for individuals legally permitted to manufacture a firearm for personal use. It is designed for the home builder, the hobbyist machinist, and the professional gunsmith who demands a higher level of fit and finish than typical forged lowers offer. If you prefer the aesthetic of a billet receiver with its crisp lines and flat surfaces, this is the right choice. It also suits builders who want a lower that is ready to accept a jig and completion kit without needing to drill or mark the fire/safe positions. This premium fire/safe marked billet 80% lower assembly is not a completed firearm and requires additional machining and parts to function.

Shipping & FFL

This item is classified as a firearm component and is not a completed receiver. As an 80% lower, it is not serialized and does not require transfer through a Federal Firearms License (FFL) dealer for shipment within the United States. However, you must comply with all federal, state, and local laws regarding the manufacture and possession of firearms. Some states and municipalities restrict or prohibit the possession or completion of 80% lowers. It is your responsibility to verify that you may legally own and complete this product in your jurisdiction. Premium Firearms LLC ships to all states where this component is legal. No FFL is required for delivery, but you must be 18 years or older to purchase. By purchasing this product, you certify that you are not prohibited from possessing firearms under federal law.