Best military rifle for hunting....as is!

[Mr. 16 gauge]

O.K., maybe this will spark some debate: What do you feel is the best military rifle out there, as is, for hunting? For the sake of argument, lets stick with whitetail sized critters (pronghorn, wild hog, black bear, mulies, ect.....no elk, moose, grizzlies, ect).
Stocks, sights, slings, ect must remain "as issued"; since most military rifles don't come with scope sights, I'm saying open sights only.
The ONLY modification I will allow is magazine capacity, in order to meet most states requirements. For those folks in states that have restrictions on semiauto rifles, imagine that your legislators had a golden moment of clarity and removed this restriction!
So....give me your thought as to what rifle(s) YOU think is best, and why.

I'm reserving my opinion until others have posted a few responses.....

Thanks.............