The Carlsons Flush Mount improved choke tube for Beretta/Benelli Mobil 20ga .610 is built from 17-4 heat treated stainless steel to deliver durable, reliable performance in high-volume upland hunting and field applications. Designed for Beretta and Benelli Mobil platforms, this choke enables tighter patterns with a flush-mounted profile, enabling consistent shot string control and improved shot placement at practical hunting distances. Steel, Lead, and Hevi-Shot can be used across constrictions, with important limits: avoid using steel larger than BB or speeds above 1550 fps in choke tubes tighter than full, and do not use steel larger than #4 in the Turkey constriction. This guidance helps preserve choke integrity while maximizing performance across a range of loads. With its precise machining and corrosion-resistant alloy, the Carlsons flush mount choke ensures a secure fit, straightforward installation, and repeatable performance for waterfowl, upland, and turkey hunting. Whether upgrading factory settings for field trials or dialing in patterns for specific game, this choke delivers consistent, dependable results with Beretta/Benelli Mobil 20ga platforms.