Forged Fire/Safe Marked 80% Lower Assembly

This forged fire/safe marked 80% lower assembly serves as the foundational starting point for builders who require a serialized-ready platform without the regulatory burden of a completed receiver. Machined from a single billet of 7075-T6 aluminum, this lower is designed to meet mil-spec dimensions while featuring clearly engraved fire/safe selector markings for a professional, factory-origin appearance. As an 80% lower, it requires final machining of the trigger pocket, hammer pin holes, and selector detent channel before it can accept standard AR-15 lower parts kits. The forging process ensures grain flow continuity through the critical buffer tower and trigger housing areas, providing structural integrity equivalent to mil-spec completed lowers.

Overview

The forged fire/safe marked 80% lower assembly is a precision-machined forging that has been heat-treated and anodized to MIL-A-8625 Type III Class 2 specifications. This unit is intentionally left incomplete at 80% of the manufacturing process to allow the end user to complete the machining steps required to bring it into compliance with federal firearms regulations. The lower features the standard forged trigger guard, flared magazine well, and rear takedown pin detent hole. All critical reference surfaces—including the pivot pin lugs, buffer tube threads, and trigger guard pin holes—are pre-machined to mil-spec tolerances. The fire/safe markings are roll-stamped into the receiver body and filled with white paint for high visibility. This component is compatible with all standard AR-15 upper receivers, buffer systems, and lower parts kits.

Features & Specs

• Material: 7075-T6 aluminum forging, heat-treated to T6 condition, hard coat anodized black per MIL-A-8625 Type III Class 2 (0.002 inch minimum thickness)
• Markings: Roll-stamped “FIRE” (forward position) and “SAFE” (rear position) with white paint fill; includes manufacturer marking “FORGED” and model designation
• Machining State: 80% complete; requires final machining of FCG pocket, hammer pin holes (0.154 inch), trigger pin holes, selector detent channel, and trigger slot; includes pre-drilled rear takedown pin detent hole

• Dimensions: Mil-spec width (0.750 inch) at trigger guard ears; standard rear takedown pin hole diameter of 0.250 inch; standard buffer tube thread specification (1.250-18 TPI); accepts all mil-spec AR-15 upper receivers
• Weight: Approximately 9.8 ounces as received; final weight depends on machining depth of trigger pocket and material removal
• Finish: Type III Class 2 hard coat anodizing, matte black, non-reflective; corrosion resistant per MIL-STD-810H

• Compatibility: Standard AR-15 lower parts kits, drop-in trigger groups, and pistol grip; requires lower receiver extension (buffer tube) that meets mil-spec thread dimensions; compatible with all 5.56 NATO and .223 Remington upper receivers
• Included: One (1) forged fire/safe marked 80% lower assembly; no jig, tooling, or LPK included

Who It’s For

This forged fire/safe marked 80% lower assembly is designed for experienced firearm builders who possess the necessary machining equipment—including a drill press, router, and appropriate jig—to complete the final 20% of machining. It is not intended for first-time builders or those without access to precision tooling. The product is appropriate for individuals who wish to manufacture a firearm for personal use in accordance with applicable federal and state laws. This lower is not a firearm and may be shipped directly to your residence or business address without an FFL transfer. It is the end user’s responsibility to ensure compliance with all local, state, and federal regulations regarding the completion and serialization of a firearm manufactured for personal use.

Shipping & FFL

This forged fire/safe marked 80% lower assembly is not classified as a firearm under the Gun Control Act of 1968 (18 U.S.C. 921(a)(3)) and therefore does not require shipment to a Federal Firearms License (FFL) holder. It may be shipped directly to any address within the United States where such items are legal to possess. No background check is required for purchase. The buyer assumes full responsibility for verifying that the receipt, possession, and completion of this product are lawful in their jurisdiction. Some states and localities have enacted restrictions on the possession or transfer of unfinished receivers; it is the buyer’s sole responsibility to know and comply with all applicable laws. By purchasing this product, the buyer acknowledges that they are legally permitted to own and complete this component. Forge does not provide legal advice and strongly encourages all purchasers to consult with a qualified firearms attorney regarding any questions about federal, state, or local regulations.