The Receiver Mounted Shell Carrier for Mossberg Shotguns is compatible with Mossberg 500, 88 and 590. Both Carriers are 6.75" long and weigh 5.3 oz. (152 g.).

In short: The Mossberg 500 is one of the best pump-action shotguns on the market today. There’s a reason these have been around for so long: they’re affordable, reliable, tough, and functional.