Patent ID: 6758005
Filing Date: 2004-07-06
Classification: B23B,Y10S

Abstract:
An apparatus for crowning the muzzle end of a barrel of a firearm comprising:an elongated rod-like pilot stem with upper and lower ends, said upper end having a wrench socket formed thereon, and a downwardly facing pilot shoulder formed intermediate said upper and lower ends; a pair of expanders slidably received on said lower end of said pilot stem, one of said expanders engaging said pilot shoulder; an expandable collet slidably received on said pilot stem and disposed between said expanders; a nut threadably attached to said lower end of said pilot stem; a deformable body attached to said nut whereby when said deformable is inserted into a bore at a muzzle end of a firearm, said deformable frictionally engages a wall of the bore to prevent rotation of said nut and permit rotation of said pilot stem relative to said nut in an engaging direction to expand said collet into contact with the wall of the bore; and a cutting tool rotatably received on said pilot stem at said upper end for engaging an end surface of the muzzle end.