Colt Expanse M4 Magpul 5.56mm NATO 16.1 Inch Barrel Phosphate Finish MBUS Rear Sight Magpul MOE SL Stock/Grip/Handguard Black Anodized Finish 30 Round

Direct gas impingement operating system. Upper and lower receiver are made from 7075-T6 aluminum with black hardcoat anodized finish. Barrel is 4150 CMV with manganese phosphate finish; 1:7 right hand twist; six grooves. A2 fixed front sight; Magpul MBUS rear sight. Single stange trigger. Magpul MOE SL pistol grip, stock, handguard and vertical grip. Thirty round PMAG included. Shipped with manual and cable lock.