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

For builders who demand precision without the premium of a serialized receiver, the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle delivers a complete, turnkey solution for your next AR-15 platform build. This bundle pairs the reinforced RL556V3 lower receiver with the dedicated RL556V3 jig system, allowing you to finish your 80% lower to exacting tolerances using standard hand tools. Whether you are a first-time builder or a seasoned gunsmith, this kit streamlines the process from raw polymer to functional lower receiver.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is engineered for the DIY enthusiast who values both cost efficiency and build quality. The RL556V3 lower features a reinforced trigger pocket, integrated rear takedown pin detent channel, and a flared magazine well for rapid reloads. The accompanying jig kit includes hardened steel drill bushings, alignment pins, and a multi-step instruction guide to ensure consistent results across every build. This bundle eliminates guesswork and reduces the risk of material waste, making it a reliable choice for completing your AR-15 lower at home.

Features & Specs

The RL556V3 lower receiver is constructed from high-impact polymer with a glass-filled nylon formulation, offering a balance of weight savings and structural rigidity. The jig kit is CNC-machined from 6061 aluminum with replaceable drill bushings to maintain accuracy over repeated use. Together, they form a complete system for finishing the fire control group pocket, trigger pin holes, and safety selector detent channels.

• Reinforced front and rear takedown pin bosses for enhanced durability under recoil
• Integrated trigger guard eliminates a separate installation step
• Dual-sided bolt catch/release pocket for ambidextrous compatibility

• RL556V3 jig kit includes drill bits, end mill, and alignment tooling for T-handle or drill press use
• Pre-drilled indexing holes for pocket depth control and repeatable results
• Compatible with standard AR-15 lower parts kits and buffer tube assemblies

• Manufacturer: Polymer80
• Category: Build Kits
• Receiver material: Impact-resistant polymer with stainless steel trigger pin inserts
• Jig material: 6061 aluminum with hardened steel bushings

Who It Is For

This bundle is intended for individuals who wish to complete a firearm lower receiver for personal use and are legally permitted to do so under federal, state, and local laws. It is suited for hobbyists who enjoy hands-on assembly, shooters looking to customize their AR-15 platform without purchasing a fully assembled lower, and those who prefer to maintain control over component quality. The RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is not for those seeking a finished, serialized product; it is a raw component that requires machining and assembly to become functional. You must be 18 years or older to purchase this product and must comply with all applicable laws in your jurisdiction.

Shipping & FFL

This bundle ships directly to your residence or business address. Because the RL556V3 lower receiver is an unfinished 80% component and is not classified as a firearm under federal law, it does not require transfer through a Federal Firearms License (FFL) dealer. However, you are solely responsible for verifying that ownership and completion of an 80% lower receiver is legal in your state, county, and municipality. Some states and localities impose restrictions on the purchase, possession, or finishing of unserialized receivers. By placing an order, you confirm that you are in compliance with all applicable laws. We recommend consulting legal counsel if you are uncertain about your local regulations. No firearm background check is required for this product.