Check the listing for details. PATTERNMASTER CODE BLACK CHOKE TUBE FOR 12GA REMINGTON PRO BORE DUCK 5536. Condition: New. Listed at 85.49 USD. PATTERNMASTER REMINGTON PRO BORE CODE BLACK DUCK PORTED CHOKE TUBE MODEL 5536 12ga Remington Pro Bore Duck CODE BLACK Product Description Patternmaster's CODE BLACK DUCK tubes will extend out the end of your barrel 1 inch and has an effective range of 50 to 70 yards. You will see a patterns similar to a Full constriction choke on paper with a 2 ¾" or 3" shell and a Modified with a 3 ½" shell, but because of the patented "stud ring" inside the tube, there is a much shorter shot string. This shorter shot string will allow more shot on target all at once so your down range energy is sure to kill instead of cripple. Our CODE BLACK DUCK tube can be used with steel or other non-toxic ammunition as well as lead, 2 ¾" or 3" or 3 ½" shells. Pick your favorite shot size to use which can range from 8 to T-Shot Non-Toxic/Steel and Lead 8 to 000 Buck. CODE BLACK DUCK tubes only come in a Non-Reflective Bronze titanium coating and are ported. Patternmaster tubes are made of Carpenter Custom 630 (aircraft quality) 17-4ph stainless steel and are heat treated to the optimum level for best performance. Warning: This tube should not be used with ammunition running faster than 1550fps, slug ammunition, or ammunition with a "Flight Control" wad. Patternmaster’s 12ga Remington Pro Bore tubes will interchange with Remington Versa Max, 105CTi, New 1100 Competition and Premier O/U. For more information about your shotgun interchange please see the firearm owner’s manual or contact the firearm manufacturer. AUTHORIZED PATTERNMASTER DEALER Add a map to your own listings. FREE Trial!