Description

Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only)

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) represents a complete build platform for the serious firearms enthusiast. This bundle delivers two unfinished frames that require final machining and assembly, placing full control in your hands. Designed for those who understand the mechanical and legal responsibilities of completing an 80% receiver, this kit from Polymer80 allows you to build a custom AR15 and a compact 9mm pistol from the ground up. Both components are manufactured in the United States from high-performance polymer, ensuring durability and precision fitment for your project.

Overview

This bundle combines the Polymer80 RL556V3 Rhino 80% AR15 lower receiver with the PF940C 80% pistol frame, both in black. The RL556V3 Rhino lower is engineered for compatibility with standard AR15 parts kits, while the PF940C frame is designed to accept Glock 19 and similar compact slide assemblies. As unfinished 80% receivers, neither component is a firearm under federal law until machining is completed by the end user. This provides an opportunity to build a fully customized firearm while learning the fundamentals of receiver finishing. The black finish on both units provides a professional, low-profile appearance suitable for any build theme.

Features & Specs

• RL556V3 Rhino AR15 Lower: Compatible with all standard mil-spec AR15 upper receivers and parts kits; features an integrated trigger guard, flared magwell for faster reloads, and a reinforced takedown pin boss. The 80% blank requires drilling of the trigger pin and hammer pin holes, as well as milling of the fire control pocket.
• PF940C Compact Pistol Frame: Designed for Glock 19 Gen3 slide and lower parts; includes a modular backstrap system for customized grip texture and length. This 80% frame requires removal of the front locking block tabs and drilling of pinholes to accept the fire control unit.
• Material and Durability: Both components are molded from high-impact polymer with internal steel reinforcement inserts at critical stress points. The material resists impact, solvents, and temperature extremes, ensuring long service life under hard use.

Who It’s For

This bundle is intended for experienced builders who possess the necessary tools and knowledge to safely complete an 80% receiver. You should be comfortable using a drill press, router, or jig system to finish the fire control pockets and pin holes. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) is ideal for hobbyists who want to build a matched set of firearms—a custom AR15 rifle and a compact carry pistol—using a single manufacturer’s platform. It is also suitable for those who wish to avoid serialization by completing a receiver for personal use, in compliance with all applicable federal, state, and local laws. This product is not for first-time builders without prior machining experience or access to proper tooling.

Shipping & FFL

Because the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) is sold as an unfinished 80% receiver, it is not classified as a firearm by the ATF and may be shipped directly to your residence without an FFL transfer. However, you must verify that possession and completion of 80% receivers are legal in your state and municipality. Some jurisdictions prohibit or restrict such items. By purchasing this product, you acknowledge that you are solely responsible for compliance with all laws regarding the completion, possession, and use of these components. We recommend consulting with an attorney if you have any questions about your legal obligations. No returns or exchanges are accepted on completed receivers.