Aim Sports MM6RK Side Shell Carrier 12 Gauge 6 Rounds Mossberg 500/590/500A

The Aim Sports MM6RK Side Shell Carrier is a quick-detach 6-round sidesaddle built specifically for 12 Gauge Mossberg shotguns. Designed as a drop-in upgrade for the Mossberg 500, 590, and 500A, it keeps six spare shells staged and ready for faster reloads at the range or in the field.

The carrier body is molded from black polymer with a smooth finish, paired with a rugged aluminum mounting plate for a secure, no-slip attachment to the receiver. The quick-detach design lets you remove the sidesaddle for cleaning or swap it between shotguns without tools, so you can keep your pump or defensive shotgun set up exactly how you want it.

Whether you're running a working shotgun or a home-defense platform, the MM6RK adds six rounds of immediate, at-hand ammunition storage right where you need it. Mounting hardware is included for a complete out-of-the-box installation.