Kicks Industries Gobblin Thunder Choke Tube - Winchester 12 ga Turkey .655 dia. Thunder is a two-time winner of the NWTF still target shoot in Atlanta GA. Gobblin? Thunder easily converts most 1012 & 20 gauge factory-threaded barrels from a mild-mannered bird gun into a turkey hunting specialist. Package Contents: Kicks Industries Gobblin Thunder Choke Tube Kicks Industries GTWIN655: Gobblin Thunder Choke Tube - Winchester 12 ga Turkey .655 dia