Doing some volunteer clean-up/repair work with a couple friends at our local range yesterday and brought along my K31. Figured it would be a good chance for a function test, if nothing else, with a few rounds of GP11 if there was enough time left when we got our work done. Been playing with pistols/revolvers a lot there lately so was time to switch it up some too. The K31, of course, function flawlessly and was a real pleasure to shoot. All we had for a target was a 12" gong at 100M so good enough for the intended first run purpose. Right from the very first shot, it was ridiculously easy to put round after round on the gong - no surprise either, but even with the iron sights and my old eyes it was a piece of cake. So yea, it works fine! 
