Brownells .40/10mm Cylinder Brass Pilot

The Brownells .40/10mm Cylinder Brass Pilot is a precision-made brass piloting tool designed for use during barrel and bore work on firearms chambered in .40 S&W and 10mm (.400–.401 caliber). Crafted from brass to protect the bore and ensure accurate alignment, this pilot is an essential component for gunsmiths performing cylinder or barrel fitting and lapping operations.