I came across this quaint and definitely not timeless article about the AR-10 in this 1957 issue of Guns Magazine. I think it’s pretty cool that they went back and digitized their old rags; there’s some really neat stuff in that issue.
They have classic issues dating all the way back to 1955.
However, I would caution you to not look the advertisements directly in the price. They may cause temporary longing and long-term heartbreak.