Patent ID: 8991293
Filing Date: 2015-03-31
Classification: F41A

Abstract:
1. A barrel for a semi-automatic pistol, comprising a bore, an outside surface, a front end and a chamber end, the barrel comprising a bottom cam surface and a top cam surface, the bottom cam surface and the top cam surface each on the outside surface of the barrel and extending from the front end toward the chamber end of the barrel to one of a pair of mating grooves disposed on the barrel, said mating grooves for securing the barrel to a slide of the pistol, the bottom cam surface and the top cam surface each having an undulating surface relative to a longitudinal axis of the barrel, each undulating surface beginning at the front end, curving outwardly relative to the longitudinal axis of the barrel, then curving inwardly relative to the longitudinal axis of the barrel, then curving outwardly relative to the longitudinal axis of the barrel, and then curving inwardly relative to the longitudinal axis of the barrel to cause oscillation of the barrel while the slide moves from a battery position to a fully retracted position and back to the battery position during a firing sequence.