Just a little background. Every year since 2006, I have hated my birthday. I still do. My friend died on my Bday in '06, so normally I just drink jack daniels and watch a double feature of Cool Hand Luke and Bullitt. And mope, of course. My wife has gotten tired of this. So she decided that she would ask me to take her to the range. Now, I've been trying to get her to go with me for some time, and she's always "busy". So her asking me to take her to do something that I love to do anyway, kinda woke me up a bit, and we set off. We went to Manchester Firing Line. They rent all sorts of guns there, including full autos. Normally I don't fire those, because they are ridiculously expensive to shoot, but my wife was picking up the tab. So I was checking out what they had, and I saw an H&K UMP 40. Brand spanking new, only a few hundred rounds through it. I got a quick tutorial on it from the range guy, and 200 rounds of ammo. Now, I would never just let my wife fire a gun that I am unfamiliar with, so I inspected it while she loaded up the magazine. And that's where I screwed up. I slapped in the mag and let the bolt slam forward, set the selector to single shot, and pulled the trigger. And CLICK. So I grabbed the charging handle, thinking it had failed to feed, and let it slam forward again. Click. Now I'm kinda ******, because this brand new H&K is screwing up already, and I really want to try it out. So I tried it out again, slapped the mag in hard, slammed the bolt forward, and pulled the trigger. And BOOM! Next thing I know, my arm is bleeding, and this very expensive UMP is destroyed in my hands. Long story short, The guy behind the counter had given me 9mm ammo. The worst part of it was that I couldn't even get mad at them. It was my fault for not ensuring I got the right ammo. And letting my wife load the mag. But my revenge was completely destroying that UMP. I actually had part of the chamber stuck in my arm, but still....... Tell me what you guys think.