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

This two-frame kit provides the foundation for two distinct builds, offering the control and craftsmanship of completing your own firearm from an 80% stage. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) delivers a matched set of pre-jigged, mil-spec compatible platforms. Designed for the builder who values precision, this kit allows you to complete a full-size AR-15 lower and a compact 9mm pistol frame with a consistent finish and manufacturer support.

Overview

The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) is a purpose-built combination for the serious DIY builder. The RL556V3 Rhino lower receiver is engineered for standard AR-15 upper receivers and LPK components, while the PF940C frame is designed to accept Glock 19 (Gen 1-3) slide and barrel assemblies. Both components are machined from reinforced polymer and require standard jigging and finishing. This kit eliminates the guesswork of sourcing separate 80% frames from different production runs, ensuring material consistency and a unified black finish.

Features & Specs

Both units in this Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) kit are manufactured to Polymer80’s exacting standards. The RL556V3 lower features a reinforced front takedown pin boss and an integrated trigger guard, with a flared magwell for faster reloads. The PF940C frame includes a standard rail system and textured grip panels.

• RL556V3 Lower: Mil-spec trigger group compatibility, standard buffer tube threads, and a 7075 T6 aluminum rear takedown pin detent.
• PF940C Frame: Designed for Glock 19 Gen 1-3 parts, includes an 18-degree grip angle with replaceable backstraps, and accepts standard Glock 19 magazines.
• Both frames are serial-number ready for optional engraving after completion, and come with all necessary pin sets, springs, and jig alignment fixtures.

Who It’s For

This kit is intended for the experienced home builder who understands the legal requirements for completing an 80% receiver. The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) is not a drop-in product; it requires drilling, milling, and finishing with appropriate jigs and tooling. This combination is ideal for builders who want a matched set for a single project or for those stocking a dedicated build bench with consistent frames. It is not recommended for first-time builders without prior experience using a router or drill press for receiver completion. The black finish is uniform across both components, providing a professional appearance without color mismatch.

Shipping & FFL

Because this product is an 80% receiver (unfinished frame), it does not meet the ATF definition of a firearm and can be shipped directly to your residence or business. No federal firearms license (FFL) transfer is required for purchase or shipping. However, you must check all local, state, and county laws before ordering, as some jurisdictions restrict the possession or completion of 80% receivers. By purchasing the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only), you confirm that you are legally able to possess and complete these components in your location. We are not responsible for any legal consequences arising from the purchase or use of this product. Standard shipping rates apply; signature may be required at the carrier’s discretion.

• Shipped directly to your door – no FFL transfer fee.
• Must be 18 years or older to purchase (21 in some states).
• Not available for shipment to California, New York, New Jersey, Connecticut, Massachusetts, or Washington, D.C.