Brownells .311 Muzzle Brass Pilot for Bore Lapping

The Brownells .311 Muzzle Brass Pilot is a precision-machined brass pilot designed for use during muzzle crown and bore lapping work. It fits .303/7.7mm caliber bores (.311-.312 diameter) and helps center and guide lapping tools accurately at the muzzle for consistent, professional results. Constructed from brass to prevent damage to the rifling and bore surface during gunsmithing operations.