ProMags are 75% 25%. There is a 25% chance they'll work. Out of that there is a 15% chance they'll work for a long time.
I use em quite often for target practice. If you cant get original or milsurp (depending on your firearm) get McGar. They are good to go. In fact McGar is the OEM mag supplier for a lot of gun manufacturers. Beretta, CZ, Witness, to name a few.
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