Tried posting this in the Ask Expert forum a week or more ago and it hasn't been reviewed/posted yet. Frustrating. So, here goes Over a year ago, I bought 3 new Asian made G19 mags. I'd read about issues with the springs, so I bought Wolff springs and switched them out. Until a week ago, the mags sat, never used. Last week and this week, I took them to the range. They work fine EXCEPT that the pistol locks open with 1 round left in the mag. Every time. I won't buy any of these mags again and will only use the ones I have for range use. Anyone have an idea what's going on?