The Mossberg International Silver Reserve II Field is a reliable over/under all-round shotgun.. Chrome plated chambers for reliable function and tight shot patterns. Dual-locking lugs provide a solid lock-up. The 12-gauge Silver Reserve II Fields have 3" chambers, and the standard 2-3/4" chamber. The Mossberg Silver Reserve II Field Over/Under Shotgun with a black walnut, hand-checkered, a polished silver-finished receiver with scroll engraving. Light and trim enough to carry comfortably in the field all day, yet rugged enough for high-volume shotgun sports.