FMK AR1 Extreme Stripped Lower Polymer Black

The FMK AR1 Extreme stripped lower receiver is crafted from high-strength polymer, offering a lightweight alternative to traditional aluminum lowers without sacrificing durability. Designed for AR-15 enthusiasts, this receiver is compatible with most standard AR-15 parts and accessories. Its sleek black finish ensures a clean, professional look for your custom build. The FMK AR1 Extreme features a reinforced design around critical stress points, enhancing its longevity and reliability. Ideal for builders seeking a cost-effective and practical solution, this lower receiver is a solid foundation for any AR-15 project. Chambered for .223/5.56mm, it delivers the performance and versatility expected from FMK Firearms.