What would you do if a business partner suddenly went bankrupt, and you were left with a large pile of bills. The correct answer is, of course: Fine, then I’ll do it myself! And that’s how Janz Präzisionstechnik came to its weapons division.

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Originally it was a supplier to the well-known revolver manufacturer Korth, but when they filed for insolvency a few years ago, Janz decided to try this business themselves with the acquired knowledge and the individual parts still in stock. After a few initial models, first in .44 caliber, then in .357, they found their calling: a changeable caliber system for revolvers.

Janz revolvers (Alexander Straube)

Janz moves right on the border between production and custom work. While there are some basic types and shapes, they can be revised, specialized, and customized based on the buyer’s needs. For example, there are three basic frame sizes that cover almost all common calibers; from .22LR to .500S&W. Nevertheless, exotic rounds would also be possible, as an extra. The same goes for the barrel. The standard is 6″, but it always depends on the customer. In one special case, even a 16″ barrel was made. The revolvers’ triggers are SA/DA and can be modified on request or readjusted by the shooters themselves.

Janz revolver in .44 Magnum (Alexander Straube)

Janz revolver with barrels and cylinders and the necessary tool (Alexander Straube)

From the factory, you can get the cylinder and barrel either solid or with relief cuts; as well as a wide range of different sights. It is also possible to install a reflex or red dot sight, but these must be purchased from an external source. And the mass of options doesn’t stop at the surface, of course. Chrome, various furnishings, plasma hardening all the way to gold plating and hand engraving have been applied to models.

Janz revolvers (Alexander Straube)

But what really sets these revolvers apart from their top-priced competitors and makes them really modular is the caliber change system. It is possible to detach the cylinder and barrel from the frame and replace it with a new caliber. While the process requires a specific tool, which is shipped with the gun, it is not difficult and can be done in mere seconds.

Janz revolver in a lined case with barrels, cylinders and the tool. The barrels include .22LR, .357 Magnum and .454 Casull (Alexander Straube)

This is not only an impressive feat of engineering but also a benefit to anyone dealing with less fortunate gun laws. Because the frame stays the same, the system only counts as a single weapon. Good if the number of guns you can own is limited.

The only downside is, that these options are reflected in the price. A basic revolver costs €5,850 ($6,348) and each interchangeable caliber – €1500 (£1,600). However, you also get a beautifully made revolver with innovative technology. Find out more at janzrevolver.com