Just got off the phone with Glock Tech Support. This question came up in another thread and got a little contentious. It's something that I had never heard of being an issue, and I do dry fire my Glocks sometimes, so I wanted to know. First, let me say that there is nothing in the current Glock Owner's Manual that says dry firing is harmful. The Tech Support (TS) person I spoke to even mentioned that. The specific question I asked was "Has there been a change in Glock's OFFICIAL position on dry firing their pistols in the last year or two?". The answer I got was "I recommend that if you dry fire the pistol other than what is needed for disassembly you use a snap cap.". I pointed out that I had not asked for his personal advice, and repeated my original question. Then he said "No, there has been no change in Glock's position on dry firing.". That was when he mentioned that it is not discouraged in the Owner's Manual. I pressed the conversation further. I asked if moderate amounts of dry firing are likely to be harmful. I mentioned that I tend to pick the gun up and dry fire it maybe 10 or 15 times every week or so. He said, emphasized really, that that is not going to cause any problems. He went on to say that damage to the breechface can occur when people dry fire their pistols for hours at a time. I asked if I would get the same answer from different TS reps - and specifically asked if Glock had instructed him to answer my questions as he had done. He said no. He said that what he had told me was just general knowledge among Glock TS reps. I don't think anything he said was unreasonable. If I dry fired my gun for hours at a time I would expect to, at least, break some striker tips. I wouldn't expect to break right through the breechface, but I guess we have to add that possibility to Glock's known "issues". But it will take a huge amount of dry firing to do that, and even then it's a rare occurrence. So, the Readers' Digest version is: The first thing out of their mouth is "use a snap cap" if you don't specify how much dry firing you do. If you specify moderate dry firing they will tell you it's OK. And there has been no change in Glock's official position on this practice.