The Tuna Cans 9mm - XL is the longest, highest-capacity version of our hard-use stainless 9mm can-built for shooters who want maximum baffles and maximum internal volume while keeping the same rugged 17-4 construction. Made from heat-treated 17-4 stainless steel, the XL model is designed for serious firing schedules and long-term durability. Up front, it includes a 3 blast chamber built to handle large mounting systems-including tri-lugs and piston boosters-giving you flexibility across PCCs and pistol setups.