Yesterday I went to the range and my bersa thunder plus .380 performed like the champ that she is. I took her home and cleaned her up. Inserted the empty magazine prior to reassembly to make sure she was good. Then I put her back together. Problem is, I then inserted a magazine with a snap cap to make sure she was functioning well and when I pull the trigger, nothing happens. I manually pulled the hammer back and the trigger jumped forward then reset. I took it back apart to see what was wrong, I pulled the trigger and the hammer cocked back. It was completely dismantled and no magazine in the well. I put the grips on.....nothing. All the parts are there and in the right place. Does anyone have any ideas what could be wrong and whether or not I can fix it myself? Thank you.