Heckler & Koch
MR556A1, 5.56x45mm, 16.5" Medium Contoured Barrel, Optics Ready, Black, 10-rd
FIND A LOCAL DEALERIVS Product #872575
MFG #81000580
- Like The HK416, The MR556A1 Uses A Proprietary HK Short-Stroke Gas Piston In Place Of The Direct-Gas-Impingement System Found On Lesser AR15-Style Rifles That Propels Exhaust Gas Into The Upper Receiver To Operate The Action. In The “Closed” HK Piston System, Exhaust Gasses Never Enter The Receiver, Which Means The HK Runs Cooler, Cleaner And More Reliably. When Adverse Conditions, Like Dust, Sand And Mud Are Introduced, The Advantage Of The HK System Becomes Even More Drastic. That Is Why So Many Of The World’s Elite Military And Law-Enforcement Customers Have Absolute Trust In Their HKs.
- The MR556A1’s Barrel Is Cold Hammer Forged From The Highest Quality Cannon-Grade Steel. It Has A 1 In 7” Twist And A Taper-Bore Configuration, With A Slightly Smaller Diameter At The Muzzle For Improved Accuracy And Velocity. And While The Material And Cold Hammer Forging Process Themselves Greatly Enhance Durability, HK's Processes Include Many Additional Steps Not Taken By Other Manufacturers To Produce Superior Accuracy And Service Life, Ensuring Performance Well Beyond “Mil-Spec.”