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

Product Overview

The Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF940C 80% Pistol Frame Combo is the definitive starting point for the dedicated firearms enthusiast who values the build process as much as the finished product. This kit solves the classic dilemma for builders by providing two of the most popular 80% platforms in one purchase: a polymer AR-15 lower and a compact 9mm pistol frame. Designed for experienced individuals who enjoy custom fabrication for personal use, this combination allows for the creation of two distinct firearms—a semi-automatic rifle and a semi-automatic pistol—from the ground up. It is intended for those who seek a deeply personalized project and understand the tools, skill, and legal responsibilities involved in completing an 80% receiver.

Key Features

• Dual-Platform Value: This single kit includes both the RL556V3 Rhino 80% AR-15 lower receiver and the renowned PF940C 80% pistol frame, offering exceptional versatility and project potential.
• High-Strength Polymer Construction: Both receivers are precision-molded from advanced, reinforced polymer, offering a significant reduction in weight compared to traditional materials without sacrificing durability or structural integrity.
• Mil-Spec Compatibility: The RL556V3 lower is designed to work with standard mil-spec AR-15 parts kits and uppers, while the PF940C frame is engineered for compatibility with widely available Glock® Gen 3 9mm components and lower parts kits, simplifying the sourcing process.
• Optimized Ergonomics: The PF940C frame features an aggressively textured grip and an undercut trigger guard for superior control and hand placement, directly from the foundation of your build.
• Project Flexibility: By providing two separate 80% platforms, this kit allows the builder to pursue different calibers and configurations, tailoring each firearm to specific applications, from range use to competition.
• Requires Finishing: As 80% products, both the lower and frame require machining, drilling, and milling by the end-user to become functional firearm receivers. Necessary jigs and tools are sold separately.

Performance & Applications

The primary application for this combination kit is for the skilled hobbyist seeking a comprehensive, hands-on building experience. The completed RL556V3 lower receiver, when paired with a standard AR-15 upper assembly, forms the foundation for a highly customizable semi-automatic rifle platform. This can be configured for various uses, including recreational target shooting, where a lightweight lower can enhance handling, or as a dedicated training rifle that benefits from a personalized ergonomic setup.

The PF940C 80% frame, once finished and assembled with a 9mm slide and parts kit, serves as the core of a reliable semi-automatic pistol. Its compact “C” size makes it suitable for both home defense preparation and practical pistol competition builds, where a custom-stippled grip and trigger geometry, set by the builder during completion, can offer a tangible performance edge. This dual-kit approach is ideal for the workshop-focused individual who appreciates having parallel projects that result in a complementary rifle and pistol pair, both reflecting a high degree of personal investment and craftsmanship.

About Polymer80

Polymer80 is a leading innovator in the firearms manufacturing industry, specifically recognized for pioneering the modern 80% receiver market. The company’s expertise lies in engineering high-performance polymer and metal substrates that meet precise dimensional specifications for reliable function. Their designs, like the PF940C featured in this kit, have become benchmarks in the builder community for their improved ergonomics and compatibility with ubiquitous parts inventories. Polymer80’s commitment to providing a legitimate platform for experienced hobbyists underscores their role in the industry, focusing on quality control, material science, and design that supports responsible, legal firearm customization by private individuals.

Why Buy From Imbert Smither Arms

Located in San Carlos, CA, Imbert Smither Arms operates with a focus on providing specific components to the knowledgeable builder community. They understand the technical requirements of projects involving items like the Polymer80 combo kit and curate their inventory accordingly. Their presence in the space indicates a familiarity with the niche needs of customers undertaking detailed builds, ensuring that the products they offer are the correct fit for the intended application.

Make Your Decision

If you possess the technical skill, proper tools, and understanding of federal and state regulations regarding 80% receivers, the Polymer80 RL556V3 and PF940C Combo Kit represents a substantial and engaging project opportunity. This bundle is not a shortcut but a commitment to two detailed builds, offering the satisfaction of creating two personalized firearms from their most fundamental components. Evaluate your workshop readiness, secure the necessary jigs and parts kits, and proceed with the confidence that you are working with proven platforms from an industry-leading manufacturer.

Technical Specifications

Frequently Asked Questions