The Patternmaster Code Black Turkey uses several different technologies to achieve incredible down range energy at distance. We ve worked hard to continue to develop a Turkey pattern that performs like no other. We understand that sometimes your entire season can come down to a few more yards and that s why The Patternmaster Code Black Turkey uses our Separating Ring technology as well as our proprietary canoe-porting in order to shorten the shot-string by as much as 75% over other constriction tubes while also improving the effective range. The Code Black Turkey is built from titanium infused 17-4ph Stainless Steel and more than 100 years of combined experience. This American Made, aircraft quality steel is the best in the world and allows for unmatched performance and durability. *For best results, Ballistic Performance, LLC, recommends ammunition velocities below 1550fps *NOT FOR USE WITH STEEL SHOT OR SLUG AMMUNITION Compatibility Maverick 12ga Model 88 Mossberg 12ga 500, 535, 930, 9200, and Mavrick Mossberg 12ga 940