I had 5 brand new USA 30 rounders that I bought during the big mag scare of '94 and put away. I decided to test them out a while back and discovered, low and behold, the springs had no temper. I loaded them up full, and by the fifteenth round the spring was a piece of bailing wire. I'm very thankful my life did not depend on that garbage. I wrote the company a very nasty letter and sent it along with the mags. The mags were replaced...no letter back with an appology...nothing. Just 5 new mags that I promptly disposed of post haste.
I will NEVER have anything to do with a USA brand mag again that doesn't involve a BF hammer, and a rock to smash them on.
You might want to buy a couple just to set up down range...it's all they are good for....expensive targets. My 2 cents.
Good luck finding decent mags for a MINI.
Hell of a good rifle!
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"Keep your head down and your powder dry"