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

Build your next AR-15 platform with confidence using the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle. This bundle brings together Polymer80’s proven Rhino series lower receiver with the precision-machined RL556v3 jig system, giving you a complete foundation for a custom build. Whether you are a first-time builder or a seasoned gunsmith, this kit delivers the core components needed to complete a serialized AR-15 lower receiver without unnecessary complexity. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is designed for those who demand reliability, repeatable results, and a streamlined workflow from start to finish.

Overview

The Polymer80 RL556V3 Rhino lower receiver is an 80% AR-15 lower that requires final machining using the included RL556v3 jig kit. Constructed from impact-resistant polymer, this receiver is compatible with standard AR-15 mil-spec parts and accepts all common trigger groups, buffer tubes, and pistol grips. The RL556v3 jig kit features hardened steel drill bushings and clear, step-by-step indexing to help you complete the fire control pocket and pin holes accurately. This bundle eliminates the guesswork of sourcing separate jigs and lowers, providing a single package for your project. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is a direct solution for builders who want a finished, functional lower receiver without the overhead of custom tooling.

Features and Specs

• Polymer80 RL556V3 Rhino 80% lower receiver: precision-molded polymer with integrated trigger guard, reinforced front and rear take-down pin bosses, and oversized magazine well for reliable feeding.
• RL556v3 jig kit: includes one-piece aluminum jig body, hardened steel drill bushings for trigger pin and hammer pin holes, and alignment pins for consistent placement.
• Complete bundle contents: one RL556V3 lower receiver, one RL556v3 jig kit, drill bits (sizes as specified by manufacturer), and instruction manual with diagrams.

• Compatibility: accepts all mil-spec AR-15 lower parts kits, buffer tube assemblies, and pistol grips. Works with standard AR-15 upper receivers.
• Material: reinforced polymer with glass-fiber content for dimensional stability and impact resistance.
• Weight: approximately 0.7 pounds (lower receiver only); jig kit weight approximately 1.2 pounds.

• Finish: black textured exterior with non-reflective surface for reduced glare.
• Required tools: drill press or hand drill, 5/32-inch end mill (recommended), and standard punch set. No specialized gunsmithing machinery is needed.
• Estimated completion time: 60 to 90 minutes for a first-time builder following the manual.

Who It Is For

This bundle is for competent adults who intend to legally manufacture a firearm for personal use. It is suited for DIY builders who want a straightforward, documented process to complete an AR-15 lower receiver at home. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is ideal for those who prefer a polymer lower with reduced weight and corrosion resistance, while still maintaining compatibility with mil-spec components. It is also a practical choice for builders who want a single SKU that includes both the lower and the jig kit, avoiding the hassle of separate purchases. This product is not intended for commercial manufacturing or resale of completed receivers.

Shipping and FFL

This product is classified as an unfinished 80% receiver and does not meet the definition of a firearm under federal law. It can be shipped directly to your residential or business address with no FFL transfer requirement. However, state and local laws vary. It is your responsibility to verify that possession and manufacture of an unfinished receiver are legal in your jurisdiction. By purchasing this polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle, you confirm that you are legally eligible to own firearms and that you will comply with all applicable laws. No FFL transfer is included, and no background check is required at the time of purchase. If your state requires an FFL for 80% receivers, you must select that option during checkout and provide a valid FFL dealer for transfer. We reserve the right to cancel any order that appears to violate federal, state, or local regulations.