Link to Midway for info: Krieger Barrel AR-15 223 Remington DCM Contour 1 7.7 Twist 20 SS I bought this hoping to build the most accurate AR for coyotes. Well, mission accomplished, er, sort of. It shoots extremely well, but is just way to heavy to pack around from stand to stand when calling. I've put exactly 138 rounds down the bore, all Nosler 69 gr. cusom competition during barrel break in, load testing and field use. These are some of THE finest barrels you can buy. Please check out the link to Midway for specs as this is where I bought it from a couple of months ago. $450 is a great deal on this barrel as they sell for over $530 new + the wait time on these can be long. I might consider partial trade for a lighter contour 20" barrel of good quality.