80% Lower Fire/Safe Marked – Anodized Black

Overview

This 80% lower fire/safe marked – anodized black component is a precision-machined receiver blank designed for builders who require clarity in their selector markings. The part is manufactured from 7075-T6 aluminum and features a hardcoat anodized black finish that meets mil-spec standards for corrosion resistance and dimensional stability. The fire/safe markings are laser-etched to a depth of 0.005 inches, ensuring they remain legible after repeated handling and cleaning. As an unserialized 80% lower, this component requires final machining of the trigger pocket and fire control group channels before assembly. The anodized black coating provides a uniform matte surface that accepts standard lower parts kits without binding or finish mismatch.

Features & Specs

Every 80% lower fire/safe marked – anodized black unit is machined from a solid billet of 7075-T6 aluminum, then Type III Class 2 hardcoat anodized for surface hardness exceeding 60 Rockwell C. The fire/safe selector markings are positioned at 0 degrees and 90 degrees from the detent axis, compliant with standard AR-15 lower receiver geometry. The anodized black finish covers all external surfaces including the trigger guard, magazine well, and buffer tube threads, with a thickness of 0.002 inches per mil-spec MIL-A-8625.

• Material: 7075-T6 aluminum billet, heat-treated to T6 temper for tensile strength of 83,000 psi
• Finish: Type III Class 2 hardcoat anodized black per MIL-A-8625, offering 0.002 inch thickness with salt spray resistance exceeding 336 hours
• Selector markings: Laser-etched “FIRE” and “SAFE” legends at 0 and 90 degrees, 0.125 inch letter height with 0.010 inch stroke width
• Pocket dimensions: 1.250 inch trigger pocket depth with 0.450 inch fire control group cavity width, requiring final milling of 0.025 inch material
• Weight: 8.2 ounces as machined, with all critical pin hole locations indicated by witness marks at 0.154 inch diameter

Who It’s For

This 80% lower fire/safe marked – anodized black component is intended for intermediate to advanced builders who possess a milling machine or CNC equipment capable of achieving 0.001 inch tolerances. The anodized black finish is suitable for builders matching existing mil-spec black upper receivers and handguards. The fire/safe markings benefit builders who prefer visual selector indicators over unmarked blanks, particularly for range firearms or training builds where quick safety status identification is necessary. This part is not recommended for first-time builders without prior experience in 80% lower completion, as the hardcoat anodized finish requires carbide tooling for precise pocket machining.

• Builders with access to a vertical mill or CNC router capable of 0.001 inch positional accuracy
• Those constructing a rifle intended for competitive shooting or recreational target use
• Individuals maintaining a collection of matching anodized black lower receivers for uniform appearance

Shipping & FFL

This 80% lower fire/safe marked – anodized black component is classified as a non-firearm receiver blank under current ATF regulations and does not require transfer through a Federal Firearms License (FFL) dealer. Shipment is made directly to the purchaser’s address with no background check required. The product is shipped in a plain box with no external markings indicating contents. The buyer assumes full responsibility for compliance with all state and local laws regarding the possession and completion of 80% lowers. This component is not a finished firearm and cannot be used as such until the end user completes the machining process and assembles a functional lower receiver. Check your local ordinances before ordering, as some jurisdictions restrict or prohibit 80% lower components. All sales are final on this item due to the nature of the product.

• No FFL transfer required for shipment to most states; verify local laws prior to purchase
• Ships via UPS Ground or USPS Priority Mail with adult signature required upon delivery
• Cannot be returned after removal from packaging due to the unfinished machining requirements