Early models had some issues. I'm afraid I don't recall what they were. I googled it when I considered buying mine about two years ago. They are all fixed now, mine runs like a house on fire. The only thing I did was to convert the trigger to a flat face which really makes a difference in the amount of trigger movement.
Thank you for the response. I have one and wanted to know what to look for. Its about a year and a half old. Never faltered, magsprings are tough as nails.
Yours is old enough to be past the serial numbers that were having problems I'm sure. Leave the mags fully loaded for a week and they will loosen up a bit.
Something else to consider, Magguts makes springs and followers that will give you an extra two rounds. For the 10 round mag, it adds 2 rounds with no change in length. I have them and have been using them for years in my P3AT and Kahr pistols without ever having a problem.