The Jet is at best a curiosity. There's not much you can do with the Model 53 and the .22 Magnum Centerfire that can't be done with a Model 19 in .357 without the extraction issues... Mine just lays in the box.

As was said earlier, the cartridge adaptors are difficult to use and while they do accomplish the task, they are at best slow and cumbersome. The interchangeable .22 LR cylinder is neat, but in the end it simply makes the Jet a K-22.

Not worth the bother in my book.