Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle

For builders who demand precision without the premium price tag, the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle delivers an all-in-one solution for completing your next AR-15 platform. As a leading name in the 80% receiver market, Polymer80 engineered this bundle to streamline the build process while maintaining the strict tolerances required for reliable firearm function. Whether you are a first-time builder or an experienced gunsmith, this bundle provides everything you need to finish your lower receiver at home with standard tools.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle combines an unfinished 80% lower receiver with the dedicated RL556v3 jig system. The Rhino V3 lower is machined from reinforced polymer and features an integrated trigger guard, flared magwell, and textured grip panels for enhanced control. The included jig kit aligns precisely with the receiver pockets, allowing you to complete the milling and drilling operations with confidence. This bundle eliminates the guesswork of sourcing separate components and ensures compatibility from the first cut to the final assembly.

Features & Specs

• 80% unfinished AR-15 lower receiver constructed from high-impact polymer; requires final machining of fire control pocket and trigger pin holes
• Integrated RL556v3 jig kit with hardened steel drill bushings and alignment pins for repeatable, accurate cuts
• Ambidextrous bolt catch recess, flared magazine well for faster reloads, and textured front/rear grip surfaces
• Compatible with mil-spec AR-15 upper receivers, lower parts kits, and buffer tube assemblies
• No serial number required for the unfinished receiver; finished product must comply with all federal, state, and local laws

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle is manufactured to Polymer80’s exacting standards. The lower receiver is injection-molded from proprietary reinforced polymer that resists impact and dimensional shift during machining. The jig kit includes a clear polycarbonate top plate for visual reference during drilling and is reusable for multiple builds. Each bundle is individually inspected before shipment to verify that all components are present and properly indexed.

Who It’s For

This bundle is designed for the individual who wants to complete a firearm at home without the need for a licensed manufacturer or expensive CNC equipment. It is ideal for hobbyists who enjoy the hands-on process of finishing an 80% lower, preppers who value component-level control over their firearms, and competitive shooters looking to build a custom AR-15 with a specific trigger or grip configuration. The RL556v3 jig is engineered for users with basic shop tools such as a drill press or hand drill, a router, and standard end mills. If you can follow step-by-step instructions and take precise measurements, you can successfully complete this receiver.

Shipping & FFL

Because the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle is classified as an unfinished 80% lower receiver that is not yet a firearm, it ships directly to your home or business address without the need for an FFL transfer. No background check is required at the time of purchase. However, it is your responsibility to verify that the possession and completion of an 80% lower receiver is legal in your jurisdiction. Once you machine the receiver into a functional firearm, federal law requires that it be transferred through a Federal Firearms License (FFL) holder if you sell or give it to another person. We strongly recommend consulting with local law enforcement or a firearms attorney before beginning your build. By purchasing this product, you acknowledge that you are not prohibited from owning firearms under state or federal law and that you will comply with all applicable regulations.