The LF556 LEO Tactical Carbine is the same preferred rifle by many law enforcement agencies and SWAT teams that is now available to civilians. This carbine is guaranteed to give sub Minute of Angle (MOA) accuracy with match grade ammunition. It features a 16 4150 Chrome Moly Vanadium Steel barrel Billet LFA Matched Receiver Set LFA D-Series Free-Floating M-LOK Handguard Two-Stage Match Grade Trigger Ambidextrous Charging Handle Rogers Deluxe Carbine 6 position telescoping stock Mid-Length Gas System and is available in 5.56 NATO. As with all Live Free Armory firearms it comes with a lifetime warranty. - Barrel Length 16 - Barrel Material 4150 Chrome Moly Vanadium Steel - Barrel Finish QPQ Corrosion Resistant - Barrel Profile Government - Chamber 5.56 NATO - Twist Rate 1 in 7 - Extension M4 - Gas System Mid-Length - Gas Block Type Low Profile .750 Diameter - Receiver Set Precision CNC Machined Billet 6061 T6 Aluminum - Muzzle Device A2 Flash Hider - MuzzleThreads 1/2x28 - Receiver Style M4 Flat top with feed ramps - Receiver Finish Cerakote - Forward Assist Yes - Dust Cover Yes - Handguard Style LFA D-Series Lightweight 15 M-Lok Free Float - Bolt Steel 9310 Steel - Bolt Carrier Steel 9310 - Staked Gas Key Yes - Fire Control Group Two Stage Match Trigger 4.5 to 5 Pound Pull Weight - Buffer Tube 6061 T-6 Aluminum Mil-Spec Tube - Adjustment 6-position collapsible - Stock Rogers Super Stock with QD - Grip Thril Rugged Tactical Grip - Magazine (1) 30-Round Magazine (where available by law) - LFA is currently transitioning rifle furniture to the products in the description. The grip and stock are different from the present picture.