Patent ID: 7299737
Filing Date: 2007-11-27
Classification: F41A

Abstract:
1. A roller delayed blowback action system for a shotgun having an ejection port for ejecting an empty cartridge of an expelled projectile, the roller delayed blowback action system comprising: a barrel including a longitudinal axis; a bolt slidable along the longitudinal axis; a pair of primary rollers located rearward of the ejection port and substantially contained within the bolt, the pair of primary rollers being spaced about the longitudinal axis and on opposing sides thereof, wherein the pair of rollers are capable of movement toward and away from the longitudinal axis; a bolt carrier slidable along the longitudinal axis and slidably attached to the bolt, the bolt carrier including a pair of bolt carrier ramps; and, a barrel extension including a pair of barrel extension ramps, wherein the pair of bolt carrier ramps and the pair of barrel extension ramps cooperate to facilitate movement of the pair of primary rollers, thus effectively delaying movement of the bolt and bolt carrier in response to firing of the shotgun.