RL556V3 80% AR15 Lower – Black

For builders who demand precision and reliability from the ground up, the rl556v3 80% ar15 lower – black offers a foundation that balances raw material integrity with the hands-on control of an 80% platform. Machined from billet 7075-T6 aluminum and finished in a matte black anodized coating, this lower receiver is designed to meet the exacting standards of the AR-15 ecosystem. Whether you are assembling a custom patrol rifle or a dedicated precision build, this component provides the dimensional stability and corrosion resistance required for long-term service. The 80% completion stage allows the builder to finalize fire control pocket geometry and trigger pin holes according to their specific tolerances, making it a preferred choice for those who value fitment autonomy.

Overview

The rl556v3 80% ar15 lower – black is a pre-machined lower receiver that requires final milling of the trigger pocket and safety selector detent channel before assembly. Constructed from a solid billet of 7075-T6 aluminum, it undergoes a Type III hard coat anodizing process in black for abrasion and corrosion resistance. The receiver is compatible with standard AR-15 upper receivers, buffer tubes, and grip configurations. It features a flared magazine well for faster reloads and a reinforced front takedown pin boss for added durability. All critical dimensions are held to Mil-Spec tolerances, ensuring seamless integration with mil-spec or enhanced components.

Features & Specs

The specification sheet for the rl556v3 80% ar15 lower – black reflects a focus on structural integrity and user-controlled final machining. Each receiver is inspected for material voids and surface finish uniformity before shipment.

• Material and Coating: Billet 7075-T6 aluminum with a Type III Class 2 hard coat anodized finish in black. This provides a surface hardness of approximately 60 Rockwell C and resists solvents, oils, and environmental moisture.
• Machining Status: 80% completed. The trigger pocket, hammer pin holes, trigger pin holes, safety selector detent channel, and bolt catch channel are left un-machined. The magazine catch pocket, rear takedown pin detent channel, and buffer tube threads are pre-cut.
• Weight and Dimensions: Receiver weight is approximately 9.2 ounces. Overall length is 8.1 inches, width is 1.3 inches at the trigger guard, and height is 2.5 inches. The magazine well flares outward to 1.6 inches at the mouth.

Additional design elements include an integrated trigger guard, a flared magazine well with a 0.25 inch bevel, and a receiver extension that accepts standard carbine or rifle buffer tubes. The bolt catch boss is reinforced with an additional 0.060 inches of material compared to mil-spec cast receivers.

Who It's For

The rl556v3 80% ar15 lower – black is intended for intermediate to advanced builders who possess the tooling and knowledge to complete the fire control pocket and safety channels. It suits individuals who require a receiver that is not serialized at the point of purchase, aligning with BATFE guidelines for unfinished receivers. This product is appropriate for those building a custom AR-15 platform where they wish to control the trigger pin fitment and overall receiver timing. It is not recommended for first-time builders without access to a jig, drill press, and end mills rated for 7075 aluminum. The 80% design allows for personal quality control over the most critical interface of the rifle: the trigger group housing.

Shipping & FFL

This product is classified as an 80% lower receiver and is not considered a firearm under federal law. As such, it does not require transfer through a Federal Firearms License (FFL) holder and can be shipped directly to your address. However, it is the buyer's sole responsibility to verify compliance with all state and local laws regarding the possession and completion of unfinished receivers. Some states and municipalities have specific restrictions on 80% lowers. By purchasing this item, you acknowledge that you are legally allowed to possess and complete an unfinished receiver in your jurisdiction. No FFL transfer is required for the purchase or shipment of this item.