Description
Product Overview
The Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF940C 80% Percent Pistol Frame Combo is the definitive starting point for the dedicated firearms enthusiast who values the process of building as much as the final result. This two-for-one kit provides a mil-spec polymer AR-15 80% lower and the widely acclaimed PF940C 80% frame, both in black. Designed for the experienced hobbyist or builder who appreciates versatility, this combination allows you to embark on two distinct projects: a semi-automatic rifle platform and a 9mm pistol platform. It’s the perfect solution for those who can’t decide where to begin their next build or want to maximize their workshop time with complementary projects. By supplying the essential foundation components, this kit puts the focus on precision machining, customization, and the deep satisfaction of creating a functional firearm with your own hands.
Key Features
- Dual-Platform Versatility: This single kit provides the core components for two of the most popular firearm builds: an AR-15 style rifle and a compact 9mm pistol. The RL556V3 lower is designed for rifle calibers, while the PF940C frame is engineered specifically for 9mm semi-automatic pistol builds.
- High-Strength Polymer Construction: Both the AR-15 lower and the pistol frame are precision-molded from Polymer80’s proprietary, reinforced polymer blend. This material offers a durable, lightweight foundation that withstands the rigors of use while providing a consistent platform for machining and assembly.
- Mil-Spec Compatibility: The RL556V3 lower receiver adheres to mil-spec dimensions, ensuring compatibility with a vast array of standard AR-15 upper receivers, parts kits, and accessories. The PF940C frame is designed to work seamlessly with readily available Glock® Gen 3 style components and aftermarket parts.
- 80% Design for Customization: As unfinished receivers, these components require machining to completion by the end-user. This design provides the legal framework for personal manufacture and allows for a fully customized fit, finish, and trigger feel that meets the builder’s exact preferences.
- Ergonomic & Modern Foundation: The PF940C frame features an aggressively textured grip and an integrated accessory rail, offering superior control and modern utility. The RL556V3 lower includes Polymer80’s enhanced flared magazine well for faster reloads.
- Project-Focused Value: Bundling these two foundational items offers significant value for the dedicated builder, providing the core for multiple projects from one purchase and streamlining the initial phase of the building journey.
Performance & Applications
The true performance of these 80% receivers is realized through the builder’s skill and choice of components. Once completed with the necessary jigs and tools, these platforms serve as the reliable foundation for highly personalized firearms.
Custom Home Defense & Duty Firearms: A builder can utilize the PF940C frame to create a tailored 9mm handgun optimized for home defense or duty use. By selecting specific slides, barrels, and sights, the builder achieves an ideal balance of size, capacity, and shootability. The completed RL556V3 lower can be paired with a caliber-appropriate upper to create a dependable AR-15 platform rifle suited for defensive scenarios, with customization options for stocks, grips, and triggers.
Precision Marksmanship & Training Platforms: For the shooter focused on skill development, a completed AR-15 built on the RL556V3 lower can be configured for precision with a match-grade trigger, free-float handguard, and optic. The PF940C-based 9mm pistol offers an economical training counterpart, allowing for high-volume practice with similar manual of arms and trigger discipline at a lower cost per round.
Advanced Gunsmithing & Hobbyist Projects: This combination kit is ideal for the hobbyist who views building as the primary pursuit. It allows for the development and refinement of machining skills on two different polymer platforms. Builders can experiment with advanced finishing techniques, custom stippling, or unique part combinations to create truly one-of-a-kind firearms that reflect a deep understanding of form and function.
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 is rooted in advanced polymer engineering and precision molding technologies, developed to meet the demands of serious builders and shooting enthusiasts. Polymer80’s products are not simple novelties; they are engineered solutions designed to provide a robust, reliable foundation for custom firearm creation. Their commitment to strict dimensional tolerances, material science, and user-centric design has established them as an authoritative brand within the building community. The PF940 series frames, including the PF940C in this kit, have become industry benchmarks for aftermarket pistol platforms due to their proven performance and extensive third-party compatibility. This record of innovation and reliability provides builders with the confidence that they are starting their project with a component built to exacting standards.
Make Your Decision
If your goal is to engage deeply with the craft of firearm building and you seek the flexibility to work on two distinct, popular platforms, the Polymer80 RL556V3 and PF940C Combo presents a clear and practical choice. It consolidates the initial phase of two significant projects, offering both immediate value and long-term potential. Before purchasing, ensure you have access to the necessary tools, jigs (sold separately), and technical knowledge to complete these receivers safely and correctly. This kit is for the informed builder ready to invest time and skill into creating personalized, functional firearms from the ground up.
Technical Specifications
Frequently Asked Questions
What makes this product stand out?
The Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) combines quality construction with reliable performance, offering exceptional value.
What warranty is included?
Polymer80 stands behind this product with their manufacturer warranty.
Who is this product for?
This is ideal for discerning buyers who prioritize quality and reliability.
Is this a quality product?
Polymer80 has built their reputation on quality, and the Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver and PF940C 80% Pistol Frame (Black Only) exemplifies that commitment.

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