590M
This review compares the traditional tube-fed Mossberg 590A1 with the new magazine-fed 590M. The 590M offers higher capacity options (5, 10, 15, 20 rounds) and features an ambidextrous magazine release, user-swappable Accu-Choke tubes, and an 18.5-inch barrel. While the 590M provides modern advantages, the reviewer notes the higher cost of magazines and a personal preference for the simplicity of the tube-fed design.









