Polymer80 RL556V3 RHINO 80% AR-15 Lower Receiver with Jig Kit
Take your AR-15 build to the next level with the Polymer80 RL556V3 RHINO 80% lower receiver and jig kit. Designed for firearm enthusiasts who value customization and DIY projects, this unfinished lower receiver allows you to legally complete the machining at home, creating a personalized firearm that meets your exact specifications. Whether you’re a seasoned builder or new to the world of AR-15s, this kit provides everything you need to get started, backed by Polymer80’s reputation for quality and innovation in polymer firearm components.

Key Features and Benefits
- 80% Lower Receiver: This unfinished receiver requires final machining to complete, making it legal for home completion without an FFL transfer, ideal for those who prefer to build their own firearms.
- Durable Polymer Construction: Made from high-strength polymer, the RL556V3 RHINO is lightweight yet robust, offering excellent durability and resistance to wear and corrosion.
- Included Jig Kit: Comes with a precision jig that guides the drilling and milling process, ensuring accurate and safe completion even for beginners.
- Compatible with AR-15 Parts: Designed to work with standard AR-15 upper receivers, triggers, and other components, allowing for seamless integration into your build.
- Easy to Machine: The polymer material is easier to work with than metal, reducing tool wear and making the completion process more accessible for DIY enthusiasts.
Why Choose This Polymer80 Lower Receiver?
Polymer80 is a trusted name in the firearm industry, known for innovative polymer-based products that combine performance with affordability. The RL556V3 RHINO model builds on this legacy, offering a reliable platform for custom AR-15 builds. Its 80% design empowers you to take control of the manufacturing process, resulting in a firearm that is uniquely yours. Plus, the included jig simplifies the completion, minimizing errors and ensuring a professional-grade finish.
Specifications and Details
| Model | RL556V3 RHINO |
| Material | High-Strength Polymer |
| Completion Status | 80% Lower (Requires Machining) |
| Included Components | Lower Receiver, Jig Kit |
| Compatibility | AR-15 Platform |
| Brand | Polymer80 |
Why Buy from Republic Arms WA?
At Republic Arms WA, we are committed to providing high-quality firearm components and accessories with exceptional customer service. Our team has extensive experience in the industry, ensuring that you receive expert advice and reliable products. We prioritize trust and transparency, offering secure transactions and fast shipping. When you shop with us, you’re supporting a local business dedicated to the firearm community in Washington and beyond.
Frequently Asked Questions (FAQ)
- Is this lower receiver legal to purchase? Yes, as an 80% lower receiver, it is unfinished and does not require an FFL transfer for purchase. However, you must comply with all local, state, and federal laws when completing and owning it.
- What tools are needed to complete the lower receiver? You will need basic machining tools such as a drill press, milling machine, or router, along with the included jig for guidance. Always follow safety protocols.
- Can I use this with any AR-15 upper receiver? Yes, it is designed to be compatible with standard AR-15 upper receivers and other components.
- Does Republic Arms WA offer support for builds? Absolutely! Our knowledgeable staff is here to assist with questions about components and builds. Contact us for expert advice.
Ready to start your AR-15 project? The Polymer80 RL556V3 RHINO 80% lower receiver with jig kit is the perfect foundation. Order today from Republic Arms WA and experience the satisfaction of building your own custom firearm!
| Model | RL556V3 RHINO |
| Material | High-Strength Polymer |
| Completion Status | 80% Lower (Requires Machining) |
| Included Components | Lower Receiver, Jig Kit |
| Compatibility | AR-15 Platform |
| Brand | Polymer80 |





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