I bought a used Glock 17 last spring. I had a Glock armorer look at it, and other than being oily, he said it was in great condition. I then bought an Advantage Arms 22 conversion kit for it. As thoroughly discussed in forums like this, I do have an occasional miss-feed or ejection issue. My real issue is that it often fires multiple rounds. It frequently lets go two or three rounds with a single trigger squeeze. Anyone else dealt with this problem?