When Delta units visited us in Zaire in 93, their sidearms were modified (Wilson combat) 1911s and two versions of the H&K MP5 in either 5.56 or 9X19. Another version was a 7.62, but never saw one.

Personally, my Colt Commander's model in .45ACP is still my favorite and I don't have to carry a cleaning rod around with me, nor perform double taps. One will do just fine

I wanted the MP5, but can't buy one