The Mossberg 590M 12 Gauge magazine is an accessory designed for the Mossberg 590M shotgun. This magazine has a capacity of 20 rounds and is compatible specifically with the 590M model. It features a sleek black color and a length of 13.1000 inches.Key FeaturesCapacity: Holds 20 rounds of 12 Gauge ammunition.Color: Finished in black for a tactical appearance.Model Fit: Specifically designed for the Mossberg 590M shotgun.