Colt Defense LE6920-FBP: 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: CarbineCaliber: 5.56 x 45MMCapacity: 30+1Upper Rec. Material: 7075-T6 AluminumUpper Rec. Finish: Black Hardcoat AnodizedBarrel Material: 4150 CMVBarrel Technical: 1:7RH 6 Groove Chrome LinedBarrel Length: 16.1 Overall Length: 32.5-36 (82.5-91.5cm)Unloaded Weight: 7.3 lbs. (3.3kg)Safeties: Reversible Safety SelectorLower Rec. Material: 7075-T6 AluminumLower Rec. Finish: Black Hardcoat AnodizedFront Sight: Magpul Mbus PRO Steel BackupRear Sight: Magpul Mbus Pro LR AdjustableFire Mode: Semi-AutoTrigger Type: Single StageRail: Geissele 13 MK4 Free-Float RailGrip: Government A2 GripStock: Magpul CTR 4-Position StockOperating System: Direct Gas ImpingementIncluded Accessories: 30rd Magpul Pmaag Magazine