Krieghoff's Drilling (three-barrel) combination gun — two 12-gauge shotgun barrels over a rifle barrel. Produced continuously since the 1950s, the Neptun uses Krieghoff's proprietary boxlock action with the selector switch on the top tang. Quarter-rib rear sight and bead front; swing-away scope mount optional. One of the few Drillings still in active production from a major manufacturer. Type: Combination Gun Action: Break-Action Caliber: 12 gauge / 9.3x74R Capacity: 3 Year introduced: 1952, Germany Weight: 88 oz Overall length: 40" Status: Active Intended use: hunting, collection