So, I just picked up a Fulton Match Carbine here in the BX from M21Fan and it’s a real beauty! And I’d like to get some 15-30rd mags for it, but Geez Louise! Prices & options are all over the place, one would think to get the USGI but those are a lot pricey and not easily found, commercial aftermarket are less than half the price but quality seems to be a problem, some purportedly work, some don’t, some will hold the bolt open, some don’t, some folks say ProMag is the best, KCI is good, most everyone believes Kahr is junk…Then there’s the 30 rounders, USGI 30’s are cheap, but you need either an M2 trigger housing or M2 mag catch to use those? But the commercial 30’s will usually fit the M1-M2? From what I gather magazines have always been the Achilles heal for the M1 Carbine.