Ruger AR-556, Semi-automatic Rifle, 223Rem/556NATO, 16.1 Medium Contour Cold Hammer Forged Barrel, MOE Pistol Grip, MOE Carbine Stock with 6-pos MilSpec Receiver Extension, MOE M-Lok Handguard, Magpul Backup Flip Sight, 30 Rounds, 1 Magazine 08515 The Ruger AR-556 is an affordable, American-made modern sporting rifle with the rugged reliability that you have come to expect from Ruger. The cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise rifling provides exceptional accuracy, longevity and easy cleaning.