Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver with Jig

About this product

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