Carlson's Buckshot Ported Choke Tube for 12 ga Remington .700

Triple Shot Technology. TST is a series of three graduated rings in the parallel section of the choke, that allow a more gradual transition from the shotgun bore to the final constriction that conveys a host of benefits to the shooter, like reduced pellet deformation, a shortened shot string, and less flyers. These choke tubes are ported to help reduce muzzle jump and recoil.