I can't seem to shake the HK USC / UMP bug! It's the one gun that I've lusted for - and not bought! Last year I got the fever, found one at a show and was kind of... unimpressed for the price. It was a regular USC and not a conversion - so I was looking at a few more $$$ to make it right. I ended up not buying it that day. I haven't seen one in person since! So I've been cruising gunbroker for a deal - and still can't seem to pull the trigger for a high priced .45 carbine! I think I'm comparing it to an AR and the fact that an AR can do everything the USC can do - and then some. (OR am I mistaken here?) So talk me into or out of a USC / Ump conversion! What's great? What's not so great?