Magazines: I own some Thermolds, 1 ProMag, 1 KCI and over a dozen CMI mags. Stick with CMI 20 rounders and you can't go wrong. The Thermolds work but just seem flimsy to me and I wouldn't bet my life on 'em. The KCI and ProMag only holds 19 rounds but also work (for me anyway). I personally stay...
I think anytime you buy surplus ammo period you should give it a good once over. Even it's from a reputable vendor. I have had some suspect rounds from Greek 30-06 HPX to German MEN 7.62 NATO.
Umm, no. A side folder on a 308 doesn't make a lot of sense to me IMO. I have the SCAR 17 which I installed the folding stock lock (partly by Maryland law) to keep it from folding. While Alpine BM-59 stocks look cool I bet it's hell getting a good stock weld on.