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

For builders who demand precision without the premium price of a fully finished receiver, the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle delivers a complete platform for a custom AR-15 build. This bundle pairs the RL556V3 Rhino 80% lower receiver with the dedicated RL556v3 jig kit, providing all necessary tooling to complete the lower at your workbench. Whether you are starting from scratch or expanding your inventory of build projects, this bundle streamlines the process without sacrificing structural integrity or fitment tolerances.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver is constructed from a high-strength polymer composite engineered to meet mil-spec dimensions for seamless compatibility with standard AR-15 upper receivers, trigger groups, and buffer tubes. The included RL556v3 jig kit is purpose-built for this lower, featuring hardened steel drill bushings and alignment guides that reduce common drilling errors. This bundle eliminates the guesswork of sourcing separate jigs and receivers, offering a unified solution for the serious builder. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is designed for those who value control over each step of the assembly process while maintaining compliance with federal regulations for 80% receivers.

Features & Specs

The RL556V3 Rhino lower receiver incorporates reinforced stress points and a flared magazine well for faster reloads. The jig kit includes replaceable drill bushings and a clamping system that secures the lower during machining. Below are the key specifications and features of this bundle.

• Polymer80 RL556V3 Rhino 80% lower receiver: precision-molded from impact-resistant polymer; accepts all mil-spec AR-15 lower parts; integrated rear takedown pin detent channel; textured grip surface for improved handling.
• RL556v3 jig kit: CNC-machined aluminum housing; hardened steel bushings for trigger pocket and pin holes; alignment pins for repeatable indexing; includes drill bits and end mill bit (sizes specified in manual).
• Compatibility: standard AR-15 upper receivers, buffer tubes, and stock assemblies; requires basic tools (drill press or hand drill recommended); complete lower receiver after machining weighs approximately 8.5 ounces.

Each component is manufactured by Polymer80, a recognized name in the 80% receiver market. The bundle ensures that the jig geometry matches the receiver pocket dimensions exactly, minimizing slop and preventing misalignment during the machining process. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is a cohesive system, not an assembly of mismatched parts.

Who It Is For

This bundle is intended for experienced firearm builders and enthusiasts who possess the necessary tools and workspace to complete an 80% lower receiver. The RL556V3 is suitable for the builder who wants a lightweight lower without the cost of billet aluminum, but who still requires the durability of a properly reinforced polymer frame. It is also appropriate for those who prefer to maintain a stock of complete jig-and-receiver kits for future projects. Beginners should note that machining an 80% lower requires mechanical aptitude, patience, and strict adherence to the included instruction manual. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is not a pre-assembled firearm; it is a workpiece that requires final machining by the end user.

Shipping & FFL

Because the RL556V3 is an 80% lower receiver and is not classified as a firearm under federal law, it may be shipped directly to your residence or business without requiring transfer through a Federal Firearms Licensee (FFL). No background check is necessary for purchase or receipt of this product. However, once the lower receiver is fully machined and assembled into a functional firearm, it must comply with all applicable federal, state, and local laws. It is the buyer’s responsibility to verify that ownership and completion of 80% receivers are legal in their jurisdiction. This product is sold as a kit of unfinished parts and tooling; the finished product is not covered by this listing. For specific questions regarding legal compliance, consult an attorney familiar with firearms law in your area. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is intended for lawful use only.

• Shipping: free ground shipping within the contiguous United States; expedited options available at checkout.
• Restrictions: cannot ship to PO boxes; signature may be required for high-value orders.
• FFL disclaimer: no FFL transfer required for this 80% lower receiver kit; final assembly responsibility rests with the purchaser.