A friend of mine came home on leave after finishing AIT an Fort Knox back in 1980.
As luck would have it, I was home for a few days, too. We got together one fine morning and started talking about all the new toys Uncle Sam was letting us play with.
This led us to talking about things we might want to own. Just out of the blue, he announced that he wanted an HK, so we piled in his car and headed off in search of same.
He wound up buying a 91 with all the accessories and a hundred rounds for right at 700 bucks out the door. He absolutely loved that rifle. I believe he sold it a couple of years back for 3 or 4 times what he paid for it.
Yours is a beautiful example, OP.