80% Lower Fire/Safe Marked – Anodized Black

This component delivers a precision-machined foundation for custom firearm builds, featuring the critical fire/safe selector markings in a durable anodized black finish. Designed for builders who demand accuracy from the ground up, this 80% lower receiver provides the dimensional integrity required for a reliable finished product. The anodized black coating offers corrosion resistance and a consistent matte appearance that integrates seamlessly with mil-spec upper receivers and parts kits.

Overview

The 80% lower fire/safe marked – anodized black component is a partially machined receiver requiring final milling to complete the fire control pocket and trigger pin holes. It is manufactured from 7075-T6 aluminum billet, heat-treated to exceed MIL-A-8625 Type III Class 2 anodizing standards. The selector markings are laser-etched to .003-inch depth for permanent visibility. This unit is compatible with standard AR-15 small-pin trigger groups and will accept all mil-spec lower parts kits. The anodized finish provides a hard, non-reflective surface that resists solvents and wear during the finishing process.

Features & Specs

Every dimension on this 80% lower fire/safe marked – anodized black receiver is held to ±0.005-inch tolerance. The pocket walls are machined to 0.625-inch thickness, leaving adequate material for safe final milling while maintaining structural integrity. The integral trigger guard is forged as part of the lower, eliminating a potential failure point. Below are the key specifications and included features:

• Material: 7075-T6 aluminum billet, heat-treated to T6 condition; anodized black per MIL-A-8625 Type III Class 2
• Markings: Laser-etched “FIRE” and “SAFE” indicators on both sides; selector detent channel pre-drilled to 0.125-inch diameter
• Pocket dimensions: 1.250-inch width at rear, 0.625-inch wall thickness on trigger pocket sides; buffer tower threaded to 1/2-28 for receiver extension

• Compatibility: Accepts all mil-spec AR-15 lower parts kits, standard buffer tubes, and pistol grips; tested with 20+ commercial upper receiver brands
• Finish thickness: 0.002-inch minimum hardcoat anodizing per ASTM B580; salt spray tested to 336 hours without corrosion
• Weight: 10.4 ounces as-machined; final weight after completion approximately 9.8 ounces depending on material removed

Who It’s For

This 80% lower fire/safe marked – anodized black is intended for experienced builders who possess the tooling and expertise to complete a receiver in compliance with federal firearms regulations. It is suitable for custom rifle projects requiring specific trigger configurations, ambidextrous selector setups, or specialized buffer systems. The anodized black finish eliminates the need for post-completion refinishing, making it ideal for builders who want a professional-grade product without additional surface treatment steps. Competitors often omit the fire/safe markings on raw receivers, but this unit ships with permanent indicators to simplify final assembly and legal compliance.

• Experienced home builders with access to a drill press, router jig, and end mills capable of 0.250-inch depth cuts
• Gunsmiths requiring multiple receivers for custom builds with consistent dimensional characteristics
• Competition shooters who need a receiver with verified fire/safe markings for match compliance

Shipping & FFL

This item ships directly to your residence or business address within the continental United States. No Federal Firearms License (FFL) transfer is required for this 80% lower fire/safe marked – anodized black component, as it is not classified as a firearm under federal law. You are solely responsible for verifying that your intended use complies with all applicable state and local laws. Some states and municipalities impose additional restrictions on unfinished receivers; it is your responsibility to confirm legal possession before ordering. All sales are final on machined components due to the nature of the product.