Description

Premium 80% Lower Fire/Safe Marked – Billet

The Premium 80% Lower Fire/Safe Marked – Billet represents a precision-machined foundation for the discerning builder seeking a reliable, unfinished lower receiver. Crafted from 7075-T6 aluminum billet stock, this component undergoes a rigorous CNC machining process to ensure critical dimensions are held to tight tolerances. The integrated Fire/Safe markings are laser-etched prior to anodizing, providing durable, high-contrast selector indicators that remain legible through repeated handling. This Premium 80% Lower Fire/Safe Marked – Billet is designed for end users who demand specification-driven performance from the initial stage of their build.

Overview

This product is a billet, unfinished lower receiver that requires final machining to complete the fire control pocket and trigger pin holes. The Premium 80% Lower Fire/Safe Marked – Billet is a direct market replacement for builders who prefer billet geometry over forged receivers. The billet construction provides a more uniform wall thickness and sharper, more defined contour lines. Each unit is inspected for surface finish and dimensional accuracy before the Type III hard coat anodizing is applied. When selecting a Premium 80% Lower Fire/Safe Marked – Billet, you are choosing a component built to strict commercial specifications with no shortcuts in material or coating.

Features & Specs

• Material: 7075-T6 aluminum billet, stress-relieved and heat-treated to Mil-Spec hardness standards. The billet stock is sourced from domestic mills and machined in-house to ensure grain flow consistency.
• Markings: Laser-etched Fire/Safe selector indicators on both sides of the receiver. Markings are filled with white pigmented enamel for high visibility in low-light conditions. The lower profile markings are recessed below the anodized surface to resist wear.
• Finish: Type III Class 2 hard coat anodized per MIL-A-8625F. This provides a surface hardness of approximately 60 Rockwell C and corrosion resistance exceeding 336 hours of salt spray testing. Color is a matte black with consistent saturation across all surfaces.

• Pocket Dimensions: The 80% pocket is machined to a depth of 0.800 inches with a wall thickness of 0.090 inches at the thin section. Trigger slot width measures 0.450 inches. All critical datum points are referenced from the takedown pin lugs for consistent alignment after finishing.
• Compatibility: Accepts standard AR-15 lower parts kits, buttstocks, and pistol grips. The trigger guard is integral and machined from the same billet. Magazine well is flared to 0.040 inches for faster reloads.
• Tolerances: All locating surfaces are held to +/- 0.003 inches. The pivot pin and takedown pin lugs are machined to a true position tolerance of 0.010 inches. This ensures proper alignment with upper receivers from major manufacturers.

Who It’s For

The Premium 80% Lower Fire/Safe Marked – Billet is intended for experienced gunsmiths, custom builders, and hobbyists who possess the necessary tooling and expertise to complete an 80% lower receiver. This product is not a finished firearm component. It is designed for individuals who understand jig alignment, end mill speeds, and proper deburring techniques. If you are assembling your first build, this Premium 80% Lower Fire/Safe Marked – Billet requires a dedicated jig and a drill press or milling machine with a 1/4 inch collet. It is also ideal for small-scale manufacturers who require consistent billet blanks for serialized production runs. This component is suitable for those who prioritize billet aesthetics and want a lower receiver with distinct, sharp lines and a non-reciprocating selector marking pattern.

Shipping & FFL

This Premium 80% Lower Fire/Safe Marked – Billet is classified as a non-firearm receiver blank under current ATF regulations. As an unfinished 80% lower, it does not require transfer through a Federal Firearms License (FFL) dealer for shipment within the United States. However, it is the buyer’s sole responsibility to verify that ownership and possession of unfinished receiver blanks are legal in their state, county, and municipality. Some states and localities regulate 80% lowers as firearms or require serialization prior to completion. By purchasing this Premium 80% Lower Fire/Safe Marked – Billet, you confirm that you are not prohibited from possessing firearms or firearm components under federal or state law. No FFL signature is required for delivery, but the carrier may require an adult signature upon receipt. This product ships via ground service with tracking and insurance included.