The Carlson's Flush Mount Modified Choke Tube for Beretta/Benelli Mobil 20ga .600 is crafted from 17-4 heat treated stainless steel to deliver durable performance in demanding field use. This choke tube is designed for Beretta and Benelli Mobil shotguns, optimizing pattern density and range with a reliable, zero-luster finish that resists the wear of steel, lead, and Hevi-Shot loads. Steel lead and Hevi-Shot may be used in all constrictions with the exceptions listed, giving you flexible options across hunting and target shooting scenarios. When using choke tubes tighter than full, avoid steel shot larger than BB or speeds exceeding 1550 fps to protect both the barrel and the chokes integrity, while turkey-specific applications prohibit steel shot larger than #4. The flush-mount design ensures a clean, snag-free profile thats easy to install and remove, making it ideal for quick barrel swaps between different game and conditions. Whether youre chasing upland birds or testing your long-range accuracy at the range, this Carlson choke tube provides consistent, predictable patterns and the versatility synonymous with trusted Beretta/Benelli platforms.