Rowe Tactical multi-caliber lower receivers are engineered to stand up to use in any conditions and provide a customizable .223/5.56 NATO platform for rifle systems that delivers unmatched performance. With an enlarged trigger guard for gloved use, a flared Magwell for easier magazine insertion and a patent-pending anti-rotational hammer and trigger pin feature, Rowe Tactical lower receivers offer unparalleled precision and stability. Rowe Tactical lower receivers are machined on modern 4- and 5-axis CNC equipment, which provides the ability to maintain centerline on multiple features. These state-of-the-art CNC machines allow machining of the lowers to deliver tolerances tighter than Mil-Spec requirements. While each Rowe Tactical lower is engineered to exact specifications, a custom look differentiates this lower receiver from the standard forged industry lower receiver. - Machined from billet 7075-T6 aluminum - Anodized to a surface hardness of 60 Rockwell - Enlarged trigger guard to allow for gloved use - Integrated enhanced trigger guard for added strength - Magwell features a flared bottom with an inner chamfer for easier magazine changes - Engineered to accept Mil-Spec and aftermarket components Rowe Tactical multi-caliber billet aluminum lowers are designed to accept Mil-Spec .223 and 5.56 components, as well as most aftermarket modifications you might want to add to your rifle system.