Polymer80 LR-308 80% Lower Receiver: Build Your Custom AR-10 Rifle
Take your firearms customization to the next level with the Polymer80 LR-308 80% lower receiver. Designed for AR-10 platform builds, this unfinished frame allows you to legally complete and assemble your own rifle, offering unparalleled personalization and satisfaction. Whether you’re a seasoned gunsmith or a DIY enthusiast, this receiver provides a solid foundation for creating a reliable, high-performance firearm tailored to your specific needs.
Key Features and Benefits
- Legal DIY Assembly: As an 80% lower receiver, this product is not classified as a firearm until you complete the machining process, making it compliant with federal regulations for home builds without an FFL transfer.
- Durable Polymer Construction: Made from high-strength polymer, the LR-308 receiver is lightweight yet robust, resistant to corrosion, and designed to withstand rigorous use.
- AR-10 Compatibility: Engineered to work seamlessly with standard AR-10 upper receivers, parts kits, and accessories, ensuring easy integration into your build.
- Customization Potential: Finish the receiver to your specifications, allowing for unique engravings, coatings, or modifications that reflect your personal style.
- Cost-Effective Solution: Save money compared to purchasing a complete lower receiver, while gaining the hands-on experience of building your own firearm.
Technical Specifications
The Polymer80 LR-308 is precision-molded to meet exacting standards, featuring reinforced stress points and a design optimized for .308 Winchester/7.62x51mm NATO calibers. It includes pre-drilled trigger and safety selector holes, with clear markings to guide the completion process. Note that this is an unfinished product requiring machining tools (e.g., drill press, jig) and knowledge to complete—always follow local laws and safety guidelines.
Why Choose This 80% Lower Receiver?
Building your own AR-10 from an 80% lower receiver offers a rewarding project that enhances your understanding of firearm mechanics. The Polymer80 LR-308 stands out for its quality materials, ease of use with compatible jigs, and the freedom it provides to create a one-of-a-kind rifle. Ideal for target shooting, hunting, or collection, it’s a popular choice among builders who value reliability and customization.
Why Buy from Republic Arms WA?
At Republic Arms WA, we are committed to providing top-quality firearms components with exceptional customer service. Our team has extensive experience in the industry, ensuring you receive expert advice and trustworthy products. We prioritize fast shipping, secure transactions, and support for all your shooting needs. Shop with confidence knowing we stand behind every item we sell.
FAQ: Why Buy from Us?
- Expertise: Our staff includes seasoned firearms enthusiasts who can answer your questions and provide guidance on builds.
- Quality Assurance: We carefully select products like the Polymer80 LR-308 for durability and performance, so you get the best value.
- Customer Support: From order placement to after-sales, we’re here to help with any issues or inquiries.
- Fast Shipping: We process orders promptly to get your parts to you quickly, so you can start building sooner.
- Secure Shopping: Our website uses advanced encryption to protect your personal and payment information.
Ready to embark on your AR-10 build? The Polymer80 LR-308 80% lower receiver is your first step toward a custom rifle that matches your vision. Order today and experience the satisfaction of creating something truly your own!

| Model | LR-308 |
| Caliber Compatibility | .308 Winchester, 7.62x51mm NATO |
| Material | High-Strength Polymer |
| Finish | Unfinished (Requires Machining) |
| Compatibility | AR-10 Platform |
| Status | 80% Lower Receiver (Not a Firearm) |
| Weight | Lightweight (Approx. 8-10 oz) |
| Included | Pre-Drilled Holes for Trigger/Safety |





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