Centurion Arms MK12 18" 5.56 NATO 1:7 416R Stainless Steel Rifle Length Barrel

Centurion Arms MK12 18" 5.56 NATO 1:7 416R Stainless Steel Rifle Length BarrelThese are Crane Spec. MK12 barrels. These barrels are the result of tens of thousands of dollars in development done by the U.S. government to give our Special Operations guys the best weapon system they can have. We have spoken with many riflemen who have used these barrels in combat and have found unanimous satisfaction with their reliability and accuracy.Specifications Material: 416R Stainless Barrel extension: M4 feed ramps Chamber: optimized for use with MK262 (Black Hills 77gr equivalent) Twist: 1 in 7 right hand Contour: for use with OPS Inc. Length: 18 in and threaded 1/2x28 for use with most common muzzle devices Weight: 2 lbs 6.3 oz*****Centurion Arms barrels require no further break-in ********Requires gunsmith installation