The Colt LE6920-FBP2 builds on the venerable Colt LE6920 adding key accessories for this special makeup including a Geissele 13-inch MK4 rail system and Magpul Pro flip-up front and rear sights. - Model Name: Carbine - Caliber: 5.56 x 45MM - Capacity: 30 + 1 - Upper Rec. Material: 7075-T6 Aluminum - Upper Rec. Finish: Black Hardcoat Anodized - Barrel Material: 4150 CMV - Barrel Technical: 1:7RH 6 Groove Chrome Lined - Barrel Length: 16.1 - Overall Length: 32.5-36 (82.5-91.5cm) - Unloaded Weight: 7.3 lbs. (3.3kg) - Safeties: Reversible Safety Selector - Lower Rec. Material: 7075-T6 Aluminum - Lower Rec. Finish: Black Hardcoat Anodized - Front Sight: Magpul MBUS PRO Steel Backup - Rear Sight: Magpul MBUS Pro LR Adjustable - Fire Mode: Semi-Automatic - Trigger Type: Single Stage - Rail: Geissele 13 MK4 Free-Float Rail - Grip: Government A2 Grip - Stock: Magpul CTR 4-Position Stock - Operating System: Direct Gas Impingement - Included Accessories: 30rd Magpul PMAG Magazine Manual Cable Lock