The Criterion replacement barrels for the .30-40 Krag platform. Original .30-40 Krag contour in rifle length (30") and carbine length (22"). These 4150 CMV barrels have the receiver threads cut and timed. Holes are drilled and tapped for the rear sight (8-32). Both the extractor cut and front dovetail are milled. Furnished in the white, these hand lapped barrels are short chambered and ready to be headspaced and installed by a qualified gunsmith.