German and Austrian and Swiss sportsmen often carried double and triple barreled rifle and shotgun combinations to the field in the 19th and 20th centuries.  These guns have never been popular with American sportsment, but for the accomplished hunter, the drilling is the ultimate way to hunt.  The guns are called "drillings" and they can be had in several different barrel configurations -- (1) double rifle/shotgun, either side-by-side or over-and-under and (2) triple barrels, either two shotgun and one rifle or two rifle and one shotgun. 

 

The advantage of the double or triple barrel guns is utter reliability -- there is nothing to jam or go wrong to spoil a first or follow-up shot.  As an example, a three barrel, double shotgun and rifle combination can be loaded with shot in one barrel, a rifle slug in another, and a rifle cartridge -- enough to engage most any game.  Most drillings have iron sights, but some are fitted with optical sights and quick-release claw-type mounts.

 

Drillings are still made today and they are custom guns.  Kreighoff in Germany makes a three-barrel drilling with free-floating barrels that is extremely accurate.  Older drillings can sometimes be found in presentation cases.  These antiques, depending on manufacturer and condition, can command prices of nearly $10,000.