Brownells .40 Cal/10mm Barrel Alignment Gauge

An essential tool for gunsmiths in barrel fitting and an excellent used gun inspection device for dealers. The rod is designed to slide down the barrel, with the centered tip aligning precisely into the firing pin hole of a properly-fitted factory barrel. Applying a small amount of layout fluid on the breech face will reveal exact alignment. Precision-engineered centerless ground steel for enhanced dimensional accuracy and surface finish