The Colt AR-15 M4 11.5 inch 5.56 SBA5 Pistol from Colt's Manufacturing Company delivers compact maneuverability with proven carbine performance in a factory-built configuration. Chambered in 5.56 NATO and built around an 11.5 inch barrel with a manganese phosphate exterior finish and chrome-lined bore and chamber, this platform is designed for durability and consistent performance under demanding conditions. The direct gas impingement operating system maintains the traditional AR-15 manual of arms and reliable cycling characteristics. Mil-spec forged 7075-T6 aluminum upper and lower receivers feature a matte black Type III hard coat anodized finish for long-term corrosion resistance and structural strength. The Colt free-float rail with Magpul M-LOK compatibility incorporates a full-length M1913 Picatinny top rail along with seven orientations of M-LOK mounting surfaces for accessory placement. Integrated steel QD sling swivel sockets and anti-rotation tabs enhance stability and support field use. A six-position mil-spec receiver extension is paired with an SB Tactical SBA5 pistol stabilizing brace for adjustable fit, and the package includes one 30-round Magpul PMAG magazine, completing a ready-to-run configuration.