I just traded my usp.45 in for a glock. The usp is a great pistol and I definitely recommend getting one however there is one problem I had with my pistol. The mag release is a problem although I had an extended one I still needed to rearrange my grip to release the magazine. I have large hands also.
It's a great pistol, just handle one before you buy.
I've literally NEVER heard of anyone ever trading a USP (let alone in the .45 caliber) for a Glock
That being said, i own a USP .45 and a G17 gen 4.
The USP .45 is a fantastic pistol. Soft shooting, stupid accurate and is built to last 101 lifetimes.
Now personally, I'm never a fan of .40 cal in polymer framed handguns. Most people i talk to aren't either. That being said, an acquaintance of mine DID shoot a USP in .40, and he said that is probably the ONLY time he would ever shoot a .40, is if it is out of a USP.
Take it for what its worth, though i was impressed because this guy is adamant against .40 cal in general.
I personally love the .45 that i own. Its a beast of a gun. Only ever had 1 FTF, and that was with WWB. I found that the case of the shell was crimped ever so slightly.
Just a word to the wise, the .40 cal and 9mm versions are slightly smaller and have a smaller grip circumference than the .45 version.
While the USP was originally designed in .40 cal, the .45 is not simply a conversion, its a redesign. H&K designed the .45 version alongside with the MK23. So you know the USP .45 is built to last.
Get a USP, it really doesn't matter what kind, you won't be disappointed. However, the way i see it is this: Why waste the recoil reduction system on a small caliber like 9mm? Get the .45, and i promise you won't be disappointed.