This Assurance UTE model comes chambered in 5.56 with a 16", CMV lightweight barrel (carbine length A2 gas block). RRA CAR lightweight quad-rail with sights attached. Includes (1) 30rd magazine and RRA case FEARURES LOWER RECEIVER: Forged RRA LAR-15M UPPER RECEIVER: Forged UTE - Universal Tactical Entry GAS SYSTEM: CAR-Length Gas System FRONT SIGHT: A2 Front Sight Base BARREL: 16" Chrome Moly Lightweight MUZZLE: A2 Flash Hider / 1/2-28 Thread TRIGGER: RRA Two-Stage Ultra Match Trigger HANDGUARD: RRA CAR Lightweight Quad Rail BUTTSTOCK: RRA Six-Position Operator CAR Stock PISTOL GRIP: Hogue Rubber Grip LENGTH: 33 Inches ACCURACY: 1 MOA at 100 yards