Product Overview
The Polymer80 RL556V3 RHINO 80% AR-15 Lower Receiver with Jig is a foundational component for the experienced firearms enthusiast looking to undertake a custom build project. This product is an 80% lower receiver, meaning it is not a firearm as sold and requires machining to completion. It is crafted from a durable, weapons-grade polymer and comes with a dedicated jig to facilitate the finishing process. Ideal for builders who appreciate a lightweight platform, the finished Flat Dark Earth lower accepts all standard AR-15 parts kits and upper receivers. This combination is particularly suited for hobbyists and shooters aiming to create an ultra-lightweight rifle for sport shooting, training, or hunting, while gaining the profound understanding of the AR-15 platform that comes from a hands-on build.
Key Features
- Complete 80% Lower & Jig Combo: Includes the proprietary jig and necessary drill bits (check product contents) to accurately guide the final machining steps, streamlining the process for builders of various skill levels.
- Weapons-Grade Polymer Construction: Made from a reinforced, high-strength polymer composite designed for durability and impact resistance, resulting in a receiver that is both incredibly lightweight and tough.
- Flat Dark Earth Finish: The molded-in Flat Dark Earth color provides a durable, non-reflective finish that is popular for modern tactical and sporting builds, offering aesthetic versatility and corrosion resistance.
- Universal AR-15 Compatibility: Engineered to mil-spec dimensions, the completed lower receiver accepts all standard AR-15 lower parts kits, pistol grips, triggers, and buffer systems, and mates seamlessly with standard AR-15 upper receivers.
- Enhanced Ergonomic Design: Polymer80’s design incorporates subtle ergonomic refinements in the grip area and overall geometry for a solid feel, differentiating it from a basic forged aluminum lower.
- Ideal for Lightweight Builds: The significant weight reduction compared to aluminum lowers makes the finished RHINO a top choice for constructing a featherweight AR-15, reducing fatigue during long carrying sessions or competitions.
Performance & Applications
The primary application of the Polymer80 RHINO is in the realm of custom firearm building and specialized use cases where weight is a critical factor. Once properly completed and assembled with quality components, its performance is defined by its specific advantages.
Ultra-Lightweight Sport/Training Rifle: For competitors in 3-Gun or action shooting sports, or for individuals engaged in extensive training regimens, every ounce saved reduces shooter fatigue and can improve handling speed. A build centered on this polymer lower can shave noticeable weight compared to a traditional build, making it easier to maneuver and hold on target for extended periods.
Dedicated .22 LR or PCC Builds: The RHINO is an excellent foundation for a dedicated rimfire AR or a pistol-caliber carbine build. The lower stresses from these cartridges are well within the design parameters of the reinforced polymer, allowing the builder to fully capitalize on the weight savings for a exceptionally handy and fun plinking or small-game hunting rifle.
Custom Project and Educational Platform: For the hobbyist, the process of completing the 80% lower with the included jig provides a deeper, hands-on understanding of the AR-15’s fire control group, safety mechanics, and overall assembly. The resulting stripped lower becomes the personalized starting point for a truly one-of-a-kind rifle tailored to the shooter’s exact preferences.
About Polymer80
Polymer80 is a recognized leader in the modern firearms ecosystem, specializing in innovative frame and receiver solutions for the builder community. The company has established its authority through a consistent focus on engineering durable polymer-based platforms that meet the demands of serious shooters. Their expertise is evident in material science, investing in proprietary polymer blends that achieve a necessary balance of strength, weight, and dimensional stability. Polymer80’s products, like the RL556V3 RHINO, are developed with direct input from the building community, resulting in designs that address real-world builder needs such as simplified jig systems and enhanced ergonomics. Their commitment to providing a legitimate path for custom firearm creation has made them a trusted name among enthusiasts who value quality, innovation, and the DIY ethos.
Why Buy From Blythes Sport Shop
Blythes Sport Shop, based in Valparaiso, IN, is more than just a retailer; it’s a hub for the firearms community in the Midwest. Their staff possesses practical, hands-on knowledge about the products they sell, from Glock handguns and ammunition to specialized components like the Polymer80 RHINO. When you purchase a build kit or component from Blythes, you’re tapping into a source that understands the context of your project. They provide not just a transaction, but access to experienced perspectives, ensuring you get the right part for your specific build goals. It’s this grounded, expert approach to the shooting sports that makes them a reliable resource for both new and seasoned builders.
Make Your Decision
The Polymer80 RL556V3 RHINO represents a specific and valuable option in the 80% lower market. Its combination of a comprehensive jig system, lightweight polymer construction, and full compatibility with standard AR-15 parts makes it a compelling choice for builders targeting a weight-optimized rifle or seeking a straightforward introduction to finishing an 80% receiver. By choosing this kit, you are selecting a proven platform from an industry-leading brand and undertaking a project that culminates in a personalized firearm built to your specifications. Assess your build goals, tool availability, and desire for a lightweight final product to determine if the RHINO is the right foundation for your next custom AR-15.
Polymer 80 AR-15 80% G150 Lower Receiver Gen 1 and Gen 2 Comparison and Review
Technical Specifications
Frequently Asked Questions
What warranty is included?
Polymer80 stands behind this product with their manufacturer warranty.
Is this a quality product?
Polymer80 has built their reputation on quality, and the Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver with Jig exemplifies that commitment.
Who is this product for?
This is ideal for discerning buyers who prioritize quality and reliability.
What makes this product stand out?
The Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver with Jig combines quality construction with reliable performance, offering exceptional value.
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