Caliber: 5.56x45MM - Capacity: 30 + 1 - Upper Rec. Material: 7075-T6 Aluminum - Lower Rec. Material: 7075-T6 Aluminum - Upper Rec. Finish: Matte Black - Lower Rec. Finish: Matte Black - Barrel Material: 4150 CMV - Front Sight: A2 Fixed Front Sight - Rear Sight: Magpul® MBUS® Rear Sight - Barrel Finish: Manganese Phosphate - Barrel Technical: 1:7RH 6 Groove Chrome Lined - Fire Mode: Semi-Automatic - Barrel Length: 16.1 in. - Trigger Type: Single Stage - Overall Length: 33-36.5 in. (81-90cm) - Grip: Magpul® MOE® SL™ Pistol Grip - Unloaded Weight: 6.95 lbs (3.15 kg) - Operating System: Direct Gas Impingement - Safeties: Reversable Safety Selector - Included Accessories: 30rd Magpul® PMAG® Magazine and Vertical Grip Manual Cable Lock - The Colt LE6920MPS Magpul® Series is the quickest and easiest way to get the customized rifle you want at an excellent price point - A2 Front Sight and Flat Top Upper Receiver are ready for the addition of Optical Sights or Accessories