The Carlsons Delta Waterfowl Choke for Beretta/Benelli Mobil MR 20ga is a mid range extended steel shot choke designed to deliver tight, dense patterns at 25 to 40 yards, making it ideal for waterfowl scenarios where precision matters. These steel shot choke tubes pattern steel shot exceptionally well thanks to a longer parallel section, which reduces flyers and enhances consistency. The design extends 3/4" outside the barrel, helping to protect your barrel from prolonged steel shot use while maintaining reliable function. Crafted from 17-4 stainless with a knurled extension and a blue finish, they combine durability with ease of handling, and Carlson backs them with a lifetime warranty for lasting performance. All steel shot sizes may be used in the close and mid-range choke tubes, giving versatility across common field loads, while a caution notes not to use steel faster than 1550 FPS or steel shot sizes larger than BB through the Long Range choke tube. This Carlson product blends practical modern metallurgy with purpose-driven design to optimize performance on demanding waterfowl hunts, reflecting Carlsons commitment to quality and reliable shot patterning.