Description

RL556V3 80% AR15 Lower – Gray

The RL556V3 80% AR15 Lower – Gray represents a foundational component for custom firearm builds, designed for the builder who prioritizes precision and material integrity. Manufactured by RL556V3, this unfinished lower receiver is constructed from 7075-T6 aluminum, a specification that ensures dimensional stability and resistance to deformation during the milling process. The gray anodized finish provides a consistent, non-reflective surface that integrates seamlessly with standard AR15 upper receivers and buffer tube assemblies. This 80% lower requires final machining of the fire control pocket and trigger pin holes to be completed by the end user, adhering to federal guidelines for non-firearm receiver blanks. The RL556V3 80% AR15 Lower – Gray is compatible with mil-spec LPKs, stocks, and grips, making it a versatile starting point for a personalized rifle platform.

Overview

The RL556V3 80% AR15 Lower – Gray is a precision-machined 80% lower receiver that serves as the structural core for a custom AR15-pattern firearm. Each unit is forged from 7075-T6 aluminum and then hard-coat anodized in gray (Type III Class 2) for corrosion resistance and wear durability. The receiver is fully indexed with reference marks for the trigger pocket, hammer pin, and trigger pin locations, simplifying the finishing process for the competent hobbyist or gunsmith. As an 80% component, this receiver does not contain a serial number and is not classified as a firearm by the ATF when sold in its unfinished state. The RL556v3 80% AR15 Lower – Gray is a direct fit for all standard AR15 upper receivers, buffer tubes, and pistol grip configurations.

Features & Specs

The RL556V3 80% AR15 Lower – Gray is engineered to meet mil-spec dimensions with enhanced tolerance margins. Below are the key specifications and design features:

• Material and Finish: 7075-T6 aluminum forging with a MIL-A-8625 Type III Class 2 gray anodized finish. The hard-coat anodizing provides a surface hardness of approximately 60 Rockwell C, reducing wear at critical contact points such as the trigger pin and hammer pin bores.
• Machining Details: The fire control pocket is pre-roughed to within 0.030 inches of final depth. Trigger slot, hammer pin hole, and trigger pin hole locations are marked with laser-etched centerlines. The buffer tube threads are pre-cut to mil-spec dimensions (1.250-18 UNEF).
• Compatibility: Accepts all standard AR15 lower parts kits, including drop-in trigger systems, buffer tubes, and pistol grips. The magazine well is at mil-spec width (0.865 inches) for compatibility with all standard AR15 magazines. Bolt catch and release slots are fully machined.

Additional specifications include a weight of 11.2 ounces (unfinished), a standard rear takedown pin lug, and a reinforced trigger guard area. The RL556v3 80% AR15 Lower – Gray does not include a buffer tube, stock, or lower parts kit.

Who It’s For

The RL556V3 80% AR15 Lower – Gray is intended for experienced builders who possess the tooling and skill to complete the fire control pocket machining. This product is suitable for hobbyists with access to a drill press, mill, or CNC jig who require a receiver that meets mil-spec tolerances without the premium cost of a serialized unit. The gray anodized finish appeals to builders constructing a two-tone or subdued color scheme, particularly for rifles paired with gray or FDE upper components. This lower is also appropriate for individuals maintaining a spare receiver inventory for future builds, provided they have the capability to finalize the machining. The RL556v3 80% AR15 Lower – Gray is not recommended for first-time builders without prior experience in 80% receiver finishing, as improper machining can compromise safety and function.

Shipping & FFL

This RL556V3 80% AR15 Lower – Gray is sold as a non-firearm receiver blank and does not require transfer through a Federal Firearms License (FFL) dealer for shipment. It will ship directly to your residential or business address via standard ground carrier. No serial number is present on the receiver. You must be 18 years of age or older to purchase this product. Check your state and local laws regarding the possession and finishing of 80% lower receivers before placing an order. Some states and municipalities impose restrictions on the ownership or completion of unfinished receivers. By purchasing this RL556v3 80% AR15 Lower – Gray, you acknowledge that you are responsible for complying with all applicable laws. We do not provide machining services or instructions beyond the product specifications listed. This product is sold as-is, and no returns are accepted on machined or altered 80% receivers.