The .410-bore Silver Reserve II rounds out Mossberg's entry O/U lineup at a sub-$600 price point, making .410 O/U accessible to budget-conscious buyers. Type: Shotgun Action: Over/Under Caliber: 410 bore Capacity: 2 Year introduced: 2013, Turkey Weight: 48 oz Overall length: 39.5" Status: Active Intended use: Hunting, Sport Shooting