This barrel features a match grade chamber and hand lapped bore, which makes it very easy to clean and care for. The strict manufacturing process that this barrel goes through holds tolerances to no more than plus or minus .0001" from breech to muzzle, and each barrel is digitally measured to ensure exact tolerances. Two additional features on this barrel include 6 longitudinal flutes which is conducive to better heat dissipation as well as a 32-hold compensator which allows for recoil free shooting. Notes:"We cut our barrel shanks oversized by .0025" to give us a very tight fit into the factory receiver. This tight fit prevents the barrel from canting downward as the locking block is installed." - Volquartsen