As a rule, the shot barrel is arranged at the top so that a running rail can be used for sighting when shooting a quick shot. A rifle barrel has a large caliber for shooting strong game. The second barrel has a smaller caliber for shooting small game. Triumphbock is the name of a barrel arrangement in which the smaller ball barrel is to the side next to the other barrels of the triplet that are vertically stacked (jacked up) (see illustration).
The large-caliber barrel is firmly aligned for the shot barrel. The small barrel can be adjusted to a common point of contact compared to the large barrel.
- Klaus-Peter König: The great book of weapon technology. Rifles, shotguns and automatic weapons in detail. Motorbuch Verlag, Stuttgart 1984, ISBN 3-613-01004-6 .