Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver With Jig

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig offers a complete foundation for building a custom AR-15 platform. This 80% lower receiver requires finishing with basic tools and the included jig kit. The RL556V3 model features a reinforced polymer frame designed to meet mil-spec dimensions for compatibility with standard AR-15 upper receivers and parts kits. As a non-serialized 80% receiver, it does not require an FFL transfer for the raw component, though final assembly and applicable laws remain the buyer’s responsibility. This kit provides the lower receiver and jig necessary to complete the machining process.

Features & Specs

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig integrates design improvements over earlier Polymer80 generations. The receiver body uses a glass-reinforced polymer blend for structural rigidity and weight reduction. The jig system guides drilling and routing for the trigger pocket, safety selector, and buffer tube threads. All critical dimensions match mil-spec tolerances for drop-in fitment with standard LPKs and stocks.

• Reinforced polymer construction with integral trigger guard and flared magwell for faster reloads
• Includes the complete RL556V3 jig with drill bits, end mill, and alignment pins
• Compatible with all mil-spec AR-15 upper receivers, lower parts kits, and buffer tube assemblies

Who It’s For

This kit is designed for builders who want to complete a lower receiver from an 80% blank without requiring a serialized transfer from a dealer. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig suits hobbyists, gunsmiths, and first-time builders who have access to a drill press or hand drill. It accommodates those who prefer a polymer lower for reduced weight and corrosion resistance. The included jig simplifies the finishing process, making it accessible to anyone comfortable with basic mechanical tasks. This product is not intended for commercial manufacturing or resale as a complete firearm without proper licensing.

• Ideal for DIY builders seeking a non-serialized lower receiver option
• Suitable for shooters who prioritize weight savings and polymer durability
• Recommended for those with prior experience or willingness to follow step-by-step instructions

Shipping & FFL

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver with Jig ships directly to your residential or business address. Because this is an 80% receiver and not a completed firearm, no Federal Firearms License (FFL) transfer is required for the raw component. However, you must comply with all federal, state, and local laws regarding the finishing and possession of unserialized firearms. Some states and municipalities impose restrictions on 80% receivers; it is your responsibility to verify legality in your jurisdiction before ordering. We ship via UPS Ground or FedEx Ground with adult signature required. Returns are accepted within 30 days for unopened, unused kits. Once machining begins, the receiver cannot be returned.

• No FFL transfer needed for the 80% receiver blank and jig kit
• Check your local laws before purchasing; buyer assumes all legal compliance
• Shipment includes the lower receiver, jig, drill bits, end mill, and instruction manual