Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig represents a precision-engineered platform for builders seeking a durable, semi-automatic lower receiver. Manufactured by Polymer80, this 80% lower receiver is designed for end-users who wish to complete a firearm from a raw component, complying with all applicable federal regulations regarding unfinished receivers. The included jig system facilitates precise drilling and milling operations, enabling the user to finish the lower receiver to ATF-compliant specifications. As a polymer-based design, the RL556V3 offers a lightweight alternative to aluminum receivers while maintaining structural integrity through glass-reinforced nylon construction. This unit is categorized as a firearm part and requires finishing before assembly into a functional AR15 lower.

Features & Specs

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig incorporates several design improvements over previous generations. The receiver body is manufactured from high-impact, glass-reinforced polymer, providing resistance to environmental stress and recoil forces. The integrated jig system includes hardened steel drill bushings and alignment guides to ensure accurate pocket machining. Below are the core specifications and included components:

• Manufacturer: Polymer80; Category: Parts; Material: Glass-reinforced polymer; Compatibility: Standard AR15 upper receivers and parts kits.
• Includes: RL556V3 lower receiver, Rhino jig with steel drill bushings, end mill bit, drill bits, and instruction manual.
• Dimensions: Receiver weight approximately 0.8 lbs; overall length 8.2 inches; accepts standard AR15 buffer tubes, grips, and trigger groups.

Who It’s For

This product is intended for experienced firearm builders and hobbyists who possess the necessary tools and skills to complete an 80% lower receiver. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig is suited for individuals who prefer a polymer platform for reduced weight or who wish to customize the lower receiver with aftermarket components. Builders should have a drill press or hand drill, a vise, and a basic understanding of firearm assembly procedures. This receiver is not for those seeking a finished, ready-to-assemble lower; it requires the user to complete the trigger pocket, hammer pin holes, and safety selector detent channel using the provided jig. All users must verify their local, state, and federal laws regarding the manufacture of firearms from unfinished receivers.

• Designed for DIY builders with intermediate to advanced machining skills.
• Ideal for shooters seeking a lightweight AR15 platform for competition, hunting, or recreational use.
• Not recommended for first-time builders without prior experience using jigs or drilling operations on polymer components.

Shipping & FFL

This Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig ships directly to your residence or business address as it is classified as an unfinished firearm component. No FFL transfer is required for shipment because the receiver is not a completed firearm under federal law. However, once the receiver is machined to functional status, it becomes a firearm subject to all applicable regulations. The end-user is solely responsible for compliance with all federal, state, and local laws regarding the manufacture and possession of firearms. By purchasing this product, you acknowledge that you are not prohibited from possessing firearms and that you will complete the receiver in accordance with the law. We recommend consulting with a local FFL dealer or legal professional if you have any questions about the legality of completing an 80% lower receiver in your jurisdiction.

• No FFL required for shipment; ships directly to your address.
• Customer must comply with all federal, state, and local laws regarding the completion of an 80% lower receiver.
• We reserve the right to refuse shipment to jurisdictions where this product is restricted or prohibited.