Holy Crap!! Now that is a collection worth having!
1911's always had a bad rap. They were originally designed for very close combat, so accuracy wasn't required. Shot once, and wherever you hit them would cause serious damage. The Beretta's in the beginning were just garbage. Always had jamming problems, for the same reason the m16 did. Their tolerances were just too tight. 1911's and M1/M14 could be buried in the sand for a month and still come up shooting. Same as the Glock.
I have an H&K USP .45 and can hammer nails with it. Everyone that has shot it can't believe the accuracy and reduced recoil. Some else mentioned it, it uses the gas to accelerate the ejecter, similar to the mechanism on the M-60 machine gun. Thus reducing the recoil.
DA, quit a competitive background. I was going to try out for the post team, but they were only recruiting combat competition. (running, jumping shooting in full gear)