Bismuth is widely recognized for its superior performance in shot shells, offering reliability and consistency. When paired with the Raptor BIZ choke, it delivers exceptional results, making it the ideal combination for optimal shot performance. A strong addition to the Raptor Series, the BIZ choke tube is the culmination of years of development and cutting-edge innovation. Constructed from durable 17-4 PH US stainless steel, these choke tubes are built to withstand the rigors of regular use while maintaining top-tier performance. Precision-machined using advanced technology, each tube is crafted to tolerances that surpass industry standards, ensuring an unmatched level of accuracy and reliability. Over-Shotguns can have a Raptor choke in only 1-barrel, the design of the choke does not allow for placement in both barrels, ensuring optimized performance in one barrel