Description
Build Your Custom AR-10 with the Polymer80 80% Lower Receiver and Jig Kit (LR-308)
Take your firearm customization to the next level with the Polymer80 80% Lower Receiver and Jig Kit, specifically designed for LR-308 platforms. This comprehensive kit empowers you to complete an 80% lower receiver in the comfort of your own workshop, providing a perfect balance of durability, ease of use, and affordability. Whether you’re a seasoned gunsmith or a DIY enthusiast, this kit simplifies the process of building a reliable AR-10 style rifle, allowing for personalized touches without the need for an FFL transfer in most jurisdictions.
Key Features and Benefits
- High-Strength Polymer Construction: Made from robust, fiber-reinforced polymer, this lower receiver is lightweight yet durable, resisting impact and environmental factors for long-lasting performance.
- Complete Jig Kit Included: The included jig and necessary tools guide you through precise machining, ensuring accurate drill and mill operations for a professional finish every time.
- Easy DIY Assembly: Designed for user-friendly completion with common workshop tools like a drill press or router, making it accessible for builders of all skill levels.
- Compatibility with LR-308 Uppers: Seamlessly pairs with standard AR-10 upper receivers and parts, offering versatility for various builds and calibers.
- Cost-Effective Solution: Avoid the markup of completed firearms by building your own, saving money while gaining hands-on experience and customization options.
Why Choose This Kit?
At Americans Gun Shop, we understand the importance of quality and reliability in firearm components. The Polymer80 LR-308 kit is engineered to meet high standards, providing a solid foundation for your custom build. Its polymer design reduces weight without sacrificing strength, ideal for hunting, target shooting, or home defense. Plus, completing an 80% lower fosters a deeper connection to your firearm, enhancing your skills and knowledge.
Specifications and Details
This kit is tailored for the LR-308 platform, which is compatible with .308 Winchester and similar calibers. It includes the 80% lower receiver, a precision jig, drill bits, and installation hardware. The receiver features standard magazine well dimensions and fire control group pockets, ensuring compatibility with aftermarket parts. Note that finishing requires basic machining skills and tools; always follow local laws and safety guidelines.
Frequently Asked Questions (FAQ)
Why Buy from Americans Gun Shop?
- Expertise and Trust: We specialize in firearm components and provide detailed product knowledge to help you make informed decisions.
- Quality Assurance: Every product is sourced from reputable manufacturers, ensuring reliability and performance.
- Customer Support: Our team is here to assist with any questions, from compatibility issues to build tips.
- Fast Shipping: We prioritize quick delivery so you can start your project without delay.
- Secure Shopping: Shop with confidence on our secure website, knowing your data is protected.
Ready to embark on your build? This Polymer80 kit is a top choice for enthusiasts looking to create a custom AR-10. For more options, explore our firearm parts collection at Americans Gun Shop.

| Platform | LR-308 / AR-10 |
| Material | Fiber-Reinforced Polymer |
| Completion Status | 80% Lower Receiver |
| Included Components | Jig, Drill Bits, Hardware |
| Compatible Calibers | .308 Winchester, 7.62x51mm NATO |
| Weight (Approx.) | Lightweight polymer design |
| Finish | Unfinished, requires machining |





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