Colt’s Manufacturing M4 Carbine Magpul, Semi-automatic Rifle, AR, 223REM/556NATO, 16.1" Barrel, Black Anodized Finish, Magpul Grip and MOE SL Stock, 30 Round, 1 Magazine CR6920MPS-B • Action: Semi-Automatic • Capacity: 30+1 • Finish: Matte Black • Sights: FT: Adjustable Post RR: Magpul MBUS Gen 2 • Barrel length: 16.1 • Overall length: 32 to 35 • Magpul MOE SL: Stock Set/ Pistol GripMagpul MOE Slim Line Furniture Aggressive TSP Grip Texture Magpul M-Lok Vertical Grip • Action: Semi-Auto • Capacity: 30 + 1 • Finish: Matte Black • Sights: MAGPUL MBUS • Barrel length: 16.1" • 15in Free-Float MLOK Rail/ Ambi Bolt Release