For a good many years I shot a Perazzi Mirage in skeet competitions and on a couple of occasions had one of the hammer springs break. If one has the spring kit, it is a matter of a minute or so to replace the broken spring. I also had a spare firing assembly, which reduces the down time to a few seconds. A Beretta 682 can have the mainspring replaced in a few minutes, but longer than the Perazzi, however, if you break a part on a Kreighoff, you are out of luck unless you have a spare gun!