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

For builders who value precision and efficiency, the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle delivers a complete starting point for your next AR15 platform project. This bundle combines the RL556V3 lower receiver with the dedicated RL556v3 jig kit, providing the essential tooling and components needed to complete an 80% lower build. Designed for use with standard AR15 mil-spec upper receivers and parts kits, this kit streamlines the finishing process while maintaining the structural integrity required for reliable performance.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is a purpose-built solution for individuals who want to complete their own AR15 lower receiver at home. The RL556V3 lower is precision-machined from 7075-T6 aluminum and features the Rhino billet-style design with integrated trigger guard and rear takedown pin detent. The included RL556v3 jig kit provides the drill bushings, end mill guide, and alignment fixtures required to accurately complete the fire control pocket, trigger pin holes, and safety selector detent channel. This bundle eliminates the guesswork of sourcing separate jig components, giving you a matched system that reduces fitting time and improves final assembly consistency.

Features & Specs

• Manufacturer: Polymer80 | Category: Build Kits | Material: 7075-T6 aluminum billet lower receiver
• Integrated trigger guard, threaded bolt catch pin, and rear takedown pin detent hole pre-machined into the RL556V3 lower
• RL556v3 jig kit includes hardened steel drill bushings, end mill guide block, locating pins, and step-by-step alignment tooling for the fire control pocket and pin holes

The RL556V3 lower receiver is compatible with all standard AR15 mil-spec upper receivers, buffer tubes, and lower parts kits. The jig kit is designed specifically for this lower model, ensuring bushing alignment matches the pre-machined indexing points. No additional modification to the jig is required for standard builds. The bundle supports both pistol and rifle configurations depending on your chosen upper and buffer system.

Who It’s For

This bundle is intended for the intermediate to advanced builder who wants a complete, matched jig and lower kit without sourcing components separately. It is suitable for hobbyists, gunsmiths, and shooters who prefer to complete their own firearm components for personal use. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is not recommended for first-time builders without prior experience using a drill press or hand router, as the finishing process requires careful attention to alignment and depth control. Individuals who already own a universal AR15 jig may still benefit from this kit if they want the dedicated tooling that matches the RL556V3’s specific pocket geometry.

Shipping & FFL

This bundle ships directly to your doorstep. No Federal Firearms License (FFL) transfer is required because the RL556V3 lower receiver is classified as an 80% unfinished receiver—it is not a firearm under federal law. You must complete the receiver yourself by machining the fire control pocket and installing the lower parts kit. Local, state, and municipal laws regarding the possession and completion of 80% receivers vary. It is your responsibility to verify that owning and finishing this product is legal in your jurisdiction before ordering. We do not provide legal advice. By purchasing this bundle, you confirm that you are legally eligible to possess and complete an unfinished receiver in your area.