Preface: I apologize if I missed an older thread; I've tried using the search function for 'dry fire' and 'dry firing', but I didn't see any relevant threads. For those of you that don't know, I'm new to the forum and just yesterday picked up my first firearm, a Glock 21 OD! As the subject reads, I have a question about dry firing -- is it OK? I've scoured this forum and Google and I keep reading different things; is there a definitive answer on this topic? Is it OK? Is it not OK? Is it OK, but in moderation? And, assuming I dry fire too much (which I don't think I do), which parts would need to be replaced to fix a problem associated with dry firing? Thanks, everyone.