Never had much luck with Triple K Mag's and got rid of the all. I no longer consider purchasing one of them and always use original Factory Mag's. Yes, they are more costly but I never experienced any problems with one.

The only exception is with 1911 Mag's. I have other quality Mag's that are also great! I use Wilson Combat, Sooting Star, Colt and unmarked USGI Mag's that never fail me.