Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle

For builders who demand precision without the paperwork, the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle delivers a streamlined path to a complete, custom AR15 platform. This bundle combines the reinforced RL556V3 lower with the dedicated RL556v3 jig system, eliminating guesswork during your build. Whether you are a first-time builder or an experienced fabricator, this kit provides the essential components to finish an 80% lower at your workbench.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle includes a precision-machined 80% lower receiver and a custom jig designed exclusively for this model. The lower features a reinforced front takedown pin boss and a flared magazine well for improved reload ergonomics. The included jig uses hardened steel drill bushings and a rigid aluminum frame to guide your tooling accurately. This bundle is compatible with standard AR15 upper receivers, lower parts kits, and buffer tubes, allowing you to complete your build using off-the-shelf components.

Features & Specs

• Reinforced RL556V3 lower receiver with integral trigger guard and flared magazine well for faster, more reliable reloads
• Dedicated RL556v3 jig kit includes hardened steel drill bushings, aluminum side plates, and stainless steel locating pins for repeatable alignment
• Accepts all Mil-Spec AR15 lower parts kits, buffer tubes, and pistol grips without modification

Manufactured by Polymer80, this bundle falls under the Build Kits category. The lower receiver is constructed from impact-resistant polymer with a reinforced front pin boss to withstand repeated use. The jig kit packs down to a compact size for storage and includes clear instructions. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle requires basic shop tools: a drill press or hand drill, end mill or router, and appropriate cutting lubricant. No specialized firearms machining experience is necessary, though familiarity with 80% builds is helpful.

Who It’s For

This bundle is designed for the home builder who wants a complete, turnkey solution for finishing an 80% lower. It suits DIY enthusiasts who prefer to assemble their own firearms without the delays of FFL transfers for the receiver itself. The reinforced design appeals to shooters who want a durable lower that can handle standard AR15 calibers, including 5.56 NATO and .223 Remington. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is also ideal for those building multiple lowers, as the jig is reusable. If you value control over your build process and want a lower that requires no serialization at the time of purchase, this kit is a practical choice.

• Home builders completing their first or tenth AR15 lower from an 80% blank
• Shooters who want a reinforced polymer lower with enhanced ergonomics for competition or range use
• Builders who prefer a dedicated jig system rather than universal fixtures for consistent results

Shipping & FFL

This bundle ships directly to your doorstep. Because the lower receiver is an unfinished 80% component, it is not classified as a firearm under federal law and does not require transfer through a Federal Firearms License (FFL) dealer. No background check is required at the time of purchase. However, once you complete the lower receiver by machining the fire control pocket and trigger pin holes, it becomes a firearm and must comply with all applicable federal, state, and local laws. Check your local regulations before purchasing. We ship to all US states where 80% lowers are legal. Standard shipping rates apply, and signature may be required on delivery.

• No FFL transfer needed for the unfinished lower receiver
• Completing the lower makes it a firearm subject to all applicable laws
• Verify local legality before ordering; we cannot ship to restricted jurisdictions