RL556V3 80% AR15 Lower – Black

For builders who demand precision and reliability from the ground up, the rl556v3 80% ar15 lower – black offers an excellent foundation for a custom AR-15 platform. Machined from forged 7075-T6 aluminum and finished in a durable black anodized coating, this 80% lower receiver is designed for the serious hobbyist or professional gunsmith who values control over every aspect of their build. The RL556v3 delivers consistent tolerances and clean geometry, making it a preferred choice for those who require a robust starting point without unnecessary pre-machined compromises.

Overview

The rl556v3 80% ar15 lower – black is an unfinished lower receiver that requires final machining of the fire control pocket, trigger pin holes, and selector detent channel before assembly. Manufactured by RL556v3, this component falls under the Parts category and is intended for individuals who possess the necessary tools and expertise to complete a firearm for personal use. The black anodized finish provides corrosion resistance and a low-profile appearance that matches standard AR-15 upper receivers and furniture. With a current market price under $100, this lowers represents a cost-effective entry point for a high-strength build without sacrificing material quality.

Features & Specs

This 80% lower receiver is built to mil-spec dimensions, ensuring compatibility with standard AR-15 parts kits and buffer tubes. The 7075-T6 aluminum forging offers superior tensile strength compared to 6061 alternatives, while the type III hard coat anodizing protects against wear and environmental exposure.

• Manufacturer: RL556v3 | Category: Parts | Material: Forged 7075-T6 aluminum
• Finish: Black hard coat anodized (MIL-A-8625, Type III, Class 2)
• Compatibility: Standard AR-15 mil-spec upper receivers, lower parts kits, and buffer tube assemblies

The RL556v3 lower features a flared magazine well for easier reloads, a threaded bolt catch pin hole, and a reinforced rear takedown lug area. The trigger pocket is un-machined, requiring end-user drilling and milling to complete. All critical dimensions are held to within 0.005 inch tolerances, providing a tight lockup with matched upper receivers.

• Weight: 10.2 ounces (unfinished)
• Caliber: Multi-caliber compatible (5.56 NATO, .300 Blackout, 9mm with appropriate mag blocks)
• Included: One RL556v3 80% lower receiver, no jig or tooling included

Who It's For

The rl556v3 80% ar15 lower – black is designed for experienced builders who have access to a drill press, mill, or router with appropriate jigs. This product is ideal for individuals looking to create a firearm without a serialized receiver, provided they comply with all applicable federal, state, and local laws regarding 80% receivers and self-manufactured firearms. It is not intended for first-time builders unless they have prior machining experience or are using a dedicated jig system. The RL556v3 lower suits those who want to build a dedicated target rifle, a lightweight field carbine, or a specialized competition platform while maintaining full control over component selection and assembly tolerances.

• Best for: Hobbyist gunsmiths, custom builders, and firearms enthusiasts with machining capability
• Not for: Individuals without proper tooling or knowledge of AR-15 lower completion procedures

Shipping & FFL

Because this product is an unfinished 80% lower receiver that does not meet the legal definition of a firearm under federal law (ATF 27 CFR 478.11), it can be shipped directly to your residence without requiring transfer through a Federal Firearms License (FFL) dealer. However, customers are solely responsible for verifying that their state and local laws permit the purchase, possession, and completion of 80% lower receivers. Some states and municipalities impose restrictions or outright bans on unserialized frames or require serialization upon completion. By purchasing the rl556v3 80% ar15 lower – black, you acknowledge that you are not prohibited from possessing firearms under federal law and that you will comply with all applicable regulations. We recommend consulting legal counsel if you have any doubt about local compliance. Shipping is calculated at checkout; standard lead times apply.