Action: Semi Auto - Caliber: 5.56X45mm /.223 - Capacity: 30 - Finish: Black Hard Anodized - Material: Aluminum/Steel - Stock: 6-Position Collapsible - Front Sight: A2 Base - Upper: Forged Flat-Top w/MIL-STD 1913 Rail - Twist: 1:7 - Barrel Length: 16 - Overall Length: 32 - 35.3 - Weight: 6.1 lb - Providing shooters with a high quality scalable AR the DSR15F is everything you need. Light and strong at 6.1 lbs. the forged flat-top receiver with MIL-STD 1913 rail and 16-in. double lapped chrome lined/chrome moly barrel combine to make a tough dependable rifle that is easily accessorized to any configuration.