RL556v3 80% AR15 Lower – White

About this product

The Trigger Logic RL556v3 80% AR15 Lower in White is a forged 7075-T6 aluminum receiver blank with a factory-applied Bright White Cerakote finish, designed for builders who must complete the final machining to comply with federal regulations. This limited-edition version includes Polymer80's RHINO series threaded bolt catch and deep roll-marked FIRE/SAFE engravings. As a former Marine armorer, I recognize these features as direct upgrades aimed at reducing installation headaches and increasing long-term reliability for a custom build.

What is the RL556v3 80% Lower used for?

This receiver is a foundational component for building a custom AR-15 rifle from the ground up, specifically requiring the end user to machine the fire control pocket, selector detent hole, and trigger pin holes. You use a drill press or router jig, like our compatible 80% AR-15 Easy Jig® Gen 1, to finish the lower, making it a legal firearm receiver. This process gives you complete control over your parts selection and allows for a truly personalized weapon system, bypassing the need for an FFL transfer on the receiver itself.

How does the RL556v3 compare to a standard anodized 80% lower?

The RL556v3's white Cerakote finish provides superior corrosion resistance and a unique visual signature compared to a standard black anodized finish like our 80% Lower Fire/Safe Marked – Anodized Black. While the Cerakote adds a measurable layer of protection against salts and solvents, the anodized version offers a slightly harder, more traditional wear surface that some builders prefer for a utilitarian look; the Cerakoted version is better for specialized applications where high visibility or maximum corrosion barrier is required.

What does it weigh and what are the dimensions?

The raw forged blank weighs approximately 9.8 ounces (278 grams) and maintains the standard AR-15 lower receiver footprint of 7.5 inches in length, 2.5 inches in height at the buffer tube tower, and 1.5 inches in width at the magwell. These dimensions are critical for ensuring compatibility with all standard AR-15 upper receivers, stocks, and grips, which is non-negotiable for a reliable build.

Who is this NOT for?

This product is not for first-time builders without access to proper machining tools or a lack of mechanical confidence, as a mistake during the finishing process can ruin the $100+ part. It's also a poor choice for someone wanting a traditional, subdued tactical appearance, as the bright white finish acts as a high-visibility marker in most environments. If your goal is a simple, straightforward build with no custom machining, buy a completed lower receiver.

What's in the box?

You receive exactly one 80% lower receiver blank; no jig, drill bits, or lower parts kit are included. The receiver comes with the threaded bolt catch pin pre-installed in the receiver, but you must supply the bolt catch and roll pin yourself. This bare-bones packaging is standard for the industry and reflects the builder-focused nature of the product, but beginners should read our guide on jig alignment before starting.

Is the RL556v3 80% Lower worth it at $0?

At a price point that is currently undisclosed, the value hinges entirely on your need for the specific white Cerakote finish and the RHINO-series threaded features. If you are building a dedicated winter/arctic rifle, a showpiece, or simply demand the easiest possible bolt catch installation, these features justify a premium over a basic forged blank. However, if color and installation ease are not priorities, a standard forged lower will serve the same mechanical function for less money.