The TacStar® 4-Shot Side Saddle for 12 Gauge Mossberg® 500 / 590 features a lightweight aluminum backing and polymer shell holder for long-lasting strength and durability that's perfect for the hunting blind or skeet shooting. This side saddle holds up to 4 rounds of 12-gauge shotgun shells and mounts to the side receiver with no gunsmithing required. Mounting hardware included. Order yours now!