Heat Treated to spec at 42-44 HRC; Proprietary broach cut rifling technique that is inherently more accurate and longer lasting than traditional rifling; Proprietary broach cut rifling technique that is inherently more accurate and longer lasting than traditional rifling; Competition style 10 degree match target crown for equal and unobstructed gas dispersion leading to greater accuracy potential; Polished feed ramp; X-Flute design shallow barrel fluting offers an aesthetically pleasing appearance that has no effect on barrel integrity or function at all; Designed for all ammunition types including cast lead; SAAMI Spec chamber; Black Nitride Finish