Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF9…

Product Overview

For the dedicated firearms enthusiast who values the process of creation as much as the final result, the Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF940C 80% Pistol Frame Combo presents a unique and rewarding project opportunity. This combination kit provides two distinct, unfinished firearm components: a polymer AR-15 style lower receiver and a compact 9mm pistol frame, both in the iconic 80% form. It is designed for the experienced hobbyist or builder who seeks a hands-on, custom manufacturing experience for personal use, adhering to all applicable federal and state regulations. The primary use is for lawful, personal fabrication, offering a deep understanding of firearm mechanics and the satisfaction of building a functional platform from a near-complete state. This black-only kit is the perfect starting point for those who appreciate modularity and want to expand their building skills across two of the most popular platforms in the industry.

Key Features

• Dual-Platform Value: This combo includes both the RL556V3 Rhino 80% lower for an AR-15 platform and the renowned PF940C 80% frame for a compact 9mm semi-automatic pistol, allowing you to undertake two distinct building projects from a single purchase.
• High-Strength Polymer Construction: Both components are precision-molded from advanced, reinforced polymer, offering a significant reduction in weight compared to metal counterparts while maintaining durability and structural integrity for reliable performance.
• Mil-Spec Compatibility: The RL556V3 lower is designed to mil-spec dimensions, ensuring compatibility with a vast array of standard AR-15 upper receivers, parts kits, and accessories. The PF940C frame is engineered to work seamlessly with common Glock® Gen 3 style components and standard lower parts kits.
• Engineered for the Builder: Each 80% receiver and frame features clearly marked drill points and removal tabs, requiring machining, drilling, and milling to complete. This process is intended for individuals who derive satisfaction from the fabrication and finishing work itself.
• Foundation for Customization: Starting from an 80% state allows for unparalleled personalization. You control the final fit, finish, and trigger assembly, resulting in a truly custom firearm tailored to your specific preferences and ergonomics.
• Separate Jig Requirement: Reflecting its purpose as a project for serious builders, the necessary jigs for proper completion (the AR-15 jig for the lower and the PF940C frame jig) are sold separately, ensuring you have the correct, dedicated tooling for each specific platform.

Performance & Applications

The utility of this combo kit is realized once the builder has successfully completed the machining and assembly process. The finished products serve as the foundational core for two highly functional firearms.

Custom AR-15 Pistol or Rifle Build: The completed RL556V3 lower receiver can be paired with a variety of uppers, allowing you to build a versatile AR-15 platform in multiple calibers (though designed for .223/5.56). This makes it suitable for applications ranging from recreational target shooting and training to lawful hunting or home defense, depending on your final configuration and local laws. The polymer construction offers a lightweight advantage for extended carry or use.

Compact 9mm Carry or Range Pistol: The finished PF940C frame, once assembled with a slide and parts kit, becomes a reliable, semi-automatic 9mm handgun. Its compact size makes it an excellent candidate for a personalized everyday carry firearm (where legally permissible) or a dedicated training pistol. The ability to hand-fit all components can lead to an exceptionally smooth trigger pull and ergonomic grip tailored to your hand.

Advanced Gunsmithing & Skill Development: Beyond the functional firearm, the primary application is the development and application of precision machining skills. This kit is for the individual who views the act of building—meticulous milling, careful drilling, and precise parts fitting—as a primary hobby. It provides a profound, hands-on education in the mechanical function of semi-automatic firearms.

About Polymer80

Polymer80 is a leading innovator in the firearms manufacturing industry, specifically recognized for pioneering the modern 80% receiver and frame market. The company operates with a clear focus on empowering experienced hobbyists and builders, providing them with high-quality, unfinished platforms that serve as a canvas for personalization and skill expression. Their expertise is evident in their material science, utilizing proprietary polymer blends that undergo rigorous testing for impact resistance, thermal stability, and long-term durability. Polymer80’s engineering team designs products with precise dimensional tolerances to ensure compatibility with a wide ecosystem of standard parts, a critical factor for builders. The brand has established its authority through a consistent commitment to product reliability, clear communication regarding the intended use and legal responsibilities of their customers, and by fostering a knowledgeable community focused on safe and responsible fabrication practices. Choosing a Polymer80 product means building on a foundation developed by specialists in polymer firearm technology.

Make Your Decision

If you are an experienced builder seeking a substantive project that expands your workshop capabilities, the Polymer80 RL556V3 and PF940C Combo represents a significant and engaging undertaking. It is not a quick-assembly kit but a serious fabrication project requiring proper tools, jigs (sold separately), and a methodical skill set. Evaluate your readiness for a two-platform build, ensure you understand the tools and steps required for proper completion, and confirm all aspects of the project align with federal, state, and local laws. For the right individual, this combo offers unmatched value, deep personal satisfaction, and the foundation for two highly customized, functional firearms born from your own workmanship.

Technical Specifications

Frequently Asked Questions