I just recently purchased a Kahr P40 and went to the range the try it out. While shooting, I experienced problems with the magazine staying locked. I thought it may have been my grip on the pistol so I made a point to avoid the release; however, I still experienced problems with the magazine trying to out. I tried different manufacturers ammo but to no avail. I fired over 200 rounds however I am still having problems getting the magazine to stay in the pistol. This will get critical for me very quickly since this was going to be my carry pistol. Any help, suggestions or opinions as to the cause of the problem will be appreciated.