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

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle delivers a complete platform for building a custom AR15 from an unfinished lower. This bundle pairs the RL556V3 Rhino lower with the dedicated RL556V3 jig kit, eliminating the need to source separate tooling. Designed for builders who want a streamlined process, this kit provides the essential components required to complete an 80% lower receiver without additional guesswork.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is a matched set engineered for precision and repeatability. The RL556V3 Rhino lower is an 80% finished receiver that requires final machining of the trigger pocket, fire control group pocket, and safety selector holes. The included jig kit aligns directly with the lower’s geometry, allowing you to complete the machining process with standard tools. This bundle is manufactured by Polymer80, a brand recognized for producing components that meet mil-spec dimensions while offering design improvements for ease of assembly.

Features & Specs

This bundle includes the RL556V3 Rhino lower receiver and the RL556V3 jig kit, both built to work together as an integrated system. The lower receiver is compatible with standard AR15 upper receivers, trigger groups, and grip configurations. Below are the key features and specifications:

• RL556V3 Rhino lower receiver constructed from reinforced polymer with integral steel trigger pin inserts for durability and long service life.
• Compatible with mil-spec AR15 parts including triggers, grips, buffer tubes, and bolt catch assemblies.
• RL556V3 jig kit includes drill bushings, alignment pins, and a rigid frame that secures the lower during machining to maintain accuracy.

Manufacturer specs confirm this product is classified under Build Kits. The jig kit is designed specifically for the RL556V3 lower geometry, so no additional jig modification is needed. The lower receiver ships as an 80% blank with no fire control group pins or trigger pocket machined, meaning it is not a firearm and can be shipped directly to your door.

Who It Is For

This bundle is intended for individuals who have the tools and knowledge to complete an 80% lower receiver. It is suitable for experienced builders who want a complete kit without buying separate jigs, as well as for first-time builders who have read the manufacturer instructions and understand the machining requirements. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556V3 Jig Kit Bundle is not a drop-in product; it requires careful drilling and finishing. If you are comfortable using a drill press, router, or hand tools and following dimensional guides, this kit provides a repeatable method to produce a functional lower receiver.

• Builders who want a single kit containing both the lower and the jig for a consistent machining experience.
• Individuals who prefer the Rhino design with its integrated trigger pin inserts and textured grip area.
• Anyone seeking a cost-effective way to complete an 80% AR15 lower without buying a separate jig system.

Shipping & FFL

The RL556V3 lower receiver is an 80% unfinished blank and is not classified as a firearm under federal law. Therefore, it does not require transfer through a Federal Firearms License (FFL) holder. This bundle can be shipped directly to your residential or business address in most states. However, it is your responsibility to verify that local, state, and county laws permit ownership and completion of 80% lower receivers. Some states or municipalities may restrict or prohibit the purchase, possession, or finishing of 80% receivers. By purchasing this product, you confirm that you are legally allowed to own and complete an 80% lower receiver in your jurisdiction. We do not ship to states or localities where such items are prohibited. No FFL transfer is required for this item.

• Shipped directly to your address without FFL involvement.
• Check your local laws before ordering; no returns for non-compliance with state or local restrictions.
• Standard shipping rates apply; estimated delivery time is 5-10 business days within the contiguous United States.