The M14 is .308. The AR-15/M16 is 5.56mm (.223).
}:-)4
Well I went to get mags for my Mini14 and was in a hurry and the salesman grabbed a couple off the shelf.
Got home and they fit the .308 rounds I had very nicely.
But they were mags for an M14 .308, not a mini14 .223
So they went back!
A buddy of mine has an HK91 for sale, I dunno, I don’t think so, the hairs on the back of my neck stand up when I pick that thing up.