OK.
First, I think the "hanger" you are talking about is actually the spacer at the end of the slide bar. It keeps the bar from bending and keeps brush out from between the barrel and slide bar. Just forget about it! That spacer is easy enough to ht with a file if it ever does give you a problem.
Second the early 760s had a seven diamond checkering patterns or the corn cob forearm. Nice either way. The next group had pressed checkering. Thee were small action changes (like metal dust covers to plastic dust covers) some good some less so. None were all that important.
Third, 7600s can be just as functional and just as accurate. Pick what you like and go kill stuff. None of them are bad guns. Ive been through 6-8 of them and they all shot without a lot of trouble.
