Mossberg X-Factor Extended Ported Waterfowl Choke Tube Full 12 Gauge 835/935. OpticsPlanet is an Authorized US Distributor for Mossberg Weapon Accessories. Ported choke tubes for extra tight pattern performance. Each tube also incorporates three rows of specially angled ports to help produce the pattern it takes to make the waterfowl or turkey hunting morning count. Adaptable to the following models: Ulti-Mag 835 935 Magnum and Maverick 91. Specifications for Mossberg X-Factor Extended Ported Waterfowl Choke Tube Full 12 Gauge 835/935 95270: Manufacturer: Mossberg Finish: Black Fabric/Material: 17-4 Stainless Steel Gauge: 12 Choke Type: Full Gun Make: Mossberg Quantity: 1 Additional Features: 40+yds Condition: New Package Contents: Mossberg 95270 X-Factor Extended Ported Waterfowl Choke Tube Full 12 Gauge Mossberg 835/935 We offer the complete line of Mossberg Weapon Accessories. For our complete selection of products by Mossberg on sale please visit our Mossberg page. For more Gun Accessories please visit our Gun Accessories store section.