I was at a gun store recently and saw some 30-round M-14 mags and inquired about the manufacture. The owner stated that they were Winchester 30-round mags. They looked and felt as solid as my GI mags, but I have never heard of a 30-round factory mag? I have been collecting/shooting for quite some time and that was news to me. I know that there were some Taiwanese imports that were made on US machinery but thought that those 30-rounders were part of that import.

thanks,
Ron

No USGI 30 round M14 Mags. None. Period.

EVER!

 All 30 rounders are from foreign or dubious sources.  It doesn't necessarily mean they are "bad" per se....but then again I have yet to ever hear glowing reports of them either.

I have one of the mystery "GI feel" thirty round M14 magazines.  AFAIK, there were no contract USGI thirty round magazines.  I did try this mystery thirty round magazine in my select fire M1A.  It works just fine in semi-automatic and automatic.  

I've heard good and bad on them.  As with anything surplus, "mebbe it werks, an mebbe it dond".

If I'm not mistaken, Ruger tried to get in on the sucess Springfield was having with the M1A, by making a version.  They called the XGI.  I do know a company made some 30 round mags for it.  They kinda look like a Thermold meets Orilite.  Some old fella around here had 3 of them at a gunshow for $75 each.  My friend bought them and says they work great. I saw one of these mags on GunBroker recently for like $85.