I bought a used Bersa Thunder .380 yesterday from a private party from CO-AR that said it only had 50 rds. through it. This was supposed to be my wifes cc weapon. I got it home, field stripped it and cleaned it. While cycling empty magazines through it with the slide open, the slide cycled forward without my pressing the slide lock. I was able to duplicate it multiple times and used 2 different magazines, thinking that there was something wrong with one of them. It happened with one of the magazines and not the other, so I originally thought it was a bad mag. Then I lightly set it down on the table (slide lock side down) with the slide open and it closed with no magazine at all. My wife was sitting there and now has no confidence in what should have been her weapon. I called the seller back this morning an had to leave a message. I'm going to see if I can't get the money back for it.The gun looked like it was in good shape but I don't believe it only has 50 rounds through it. Sorry for the long winded explanation. I'm super frustrated right now as this was my first private party buy. Any help you guys can offer as to what may be wrong with it would be great. Hopefully the seller does the stand up thing. Thanks in advance.