Machined from solid 416 stainless barstock, tolerances held to +/- .001" in critical areas, finish heat treated to 40-42 HRC and cut broach rifled. Left hand 1 in 16" twist with 6 lands and grooves. Barrels are semi-drop in and usually require fitting by a qualified gunsmith.
Note: Ported barrels are drop-in. Slide replacement or modifications are not necessary.