These are produced with the same chamber as our Spec. MK12 barrels with a slightly heavier profile. Built for reliability and accuracy.
Material: 416R Stainless
Barrel extension: M4 feed ramps
Chamber: optimized for use with MK262 (Black Hills 77gr equivalent)
Twist: 1 in 7 right hand
Length: 16in and threaded 1/2x28 for use with most common muzzle devices
Weight: 16in 2lb 5.6oz