A device designed specifically for the Mossberg 590 shotgun allows the firearm to chamber and fire shorter, less powerful 1.75-inch shotshells, in addition to standard 2.75-inch shells. This typically involves a magazine tube insert and potentially other modifications depending on the specific product.
The ability to use reduced-recoil ammunition offers several advantages. These smaller shells generally produce less felt recoil, making the shotgun more comfortable to shoot, particularly for recoil-sensitive individuals or during extended training sessions. They also frequently offer a lower cost per round, allowing for more economical practice. Furthermore, the reduced report and muzzle flash can be advantageous in specific tactical situations. Historically, adapting firearms to accommodate different ammunition types has been a common practice for enhancing versatility and cost-effectiveness.