Carlson's Choke Tubes are manufactured from corrosion resistant 17-4 PH Stainless Steel. Carlson's Tactical Breecher Choke Tubes are designed specifically for the tactical firearm and home defense. The choke tube is extended and features multiple ports, a series of rigid points as well as knurled rings around the body in order to facilitate faster insertion and removal from the barrel. The choke has a blue finish and is backed with a lifetime warranty. Notes: Slugs, Buckshot, Copper Shoot, Hevi Shot, and Steel Shot may be used with this choke tube.