I think they're fine. If you get a deal like by 3 get 1 free, get them. Or if they're under $10 each try one.
I'm thinking they are or were canadian standard issue.
Several years ago,they were 80 dollars apiece. If there made in Wilson NC,there fine,if there from Canada,the quality is not as good. I have several of them and they all feed fine.Only thing bad I've read about the new ones are they melt w/ fullauto.
Ive been in the market for some more myself,seen them from 12 to 30 bucks eack.
I have a few of the 20s and several of the 30s and all have held up fine so far. Havent tried any of them in any of my select fire weapons because I heard they would melt. Might have to test that theory tomorrow at the range.good mags, i have 6 and like them
$3.99 each here
AR-15 .223 20rd Thermold Master Molder Military LE Mag New