The Tiger Rock Inc. 223/5.56 Rifle Lower Parts Kit is essential for constructing a robust AR-15 lower receiver. This all-inclusive kit features U.S.A.-made solid steel trigger and hammer, ensuring reliability and performance. Engineered for both novice and experienced builders, our lower parts kit includes a ergonomic polymer A2-style pistol grip and flat trigger guard, all finished in a sleek matte black. Craft a fully-functional custom lower receiver with confidence. Comprehensive kit includes all essential components Solid steel trigger and hammer made in the U.S.A. Includes standard polymer A2-style pistol grip and flat trigger guard Optimized design for seamless functionality Create your AR-15 lower receiver with precision using Tiger Rock Inc.'s kit.