Most are USGI's.

Let's see here...I've got something like 9 USGI 30 rdrs, 6 Thermold 30's and 4 USGI 20rd's - 2 Colt, (came with rifle), 1 Adventureline and 1 OKAY brand. I'm not a real mag-whore like some. :wink:

None of my Thermolds have ever caused me a bit of grief. I would rate them as highly as the USGI mags.