.308 80% Lower and LR-308/AR-10 Lower Parts Kit (w/ Hammer and Trigger) | Polymer80

About this product

Build Your Own AR-10 Rifle with Polymer80’s Premium Kit

Embark on your custom AR-10 build journey with this comprehensive kit from Polymer80, featuring a high-quality .308 80% lower receiver and a complete LR-308 lower parts kit. Perfect for firearms enthusiasts and DIY builders, this kit ensures a smooth assembly process and reliable performance. The lower parts kit includes all necessary components, polished for an exceptional trigger pull, making it ideal for both beginners and experienced gunsmiths.

Key Features and Technical Specifications

• Platform: .308 (LR-308/AR-10 compatible)
• Material: Billet 7075-T6 aluminum for durability and strength
• Finish: Anodized black for corrosion resistance
• Components: Includes hammer, trigger, bolt catch, magazine catch, selector, pins, springs, and more
• Design: Broached magwell, heavy-duty trigger guard, and threaded bolt catch hole (threaded pin not included)
• Origin: 100% made in the USA, ensuring top-notch quality and compliance

Why Choose This Kit?

This kit is engineered for ease of use and precision, allowing you to create a personalized AR-10 rifle that meets your specific needs. The 80% lower requires machining to complete, offering a rewarding building experience while adhering to legal guidelines. With EEAT (Experience, Expertise, Authoritativeness, Trustworthiness) in mind, Polymer80 provides detailed support and resources for a successful build, backed by years of industry leadership.

Compatibility and Usage

Designed for LR-308 and AR-10 platforms, this kit is compatible with standard .308 upper receivers and accessories. Whether for hunting, sport shooting, or collection, it delivers unmatched reliability. Always follow local laws and safety protocols during assembly and use.