Almost all Weatherby shotguns feature an interchangeable, screw-in Integral Multi-Choke System (Briley compatible thread pattern) to allow you to tailor your shot pattern for specific needs. Crafted from steel, Weatherby chokes also feature a unique design that reduces thread fouling and aids in easy removal/changes in the field. Certified for steel shot through modified choke constrictions. All Weatherby chokes feature an easy-to-use identification system to allow you to quickly identify the proper choke for your shooting situation.