My BG38 crimson trace laser stopped working but I have been unable to open the case to replace batteries. The allen wrench that came with the BG38 that is used to adjust the sites does not seem to fit the screw to open the case to replace batteries. I tried to do this several times and hope I did not strip the screw. I called Crimson Trace (CT) and they were not sure if the allen wrench for the sites was the same for the case. They mailed me about 5 other allen wrenches, none fit. When I called CT back the rep said I should call S&W as they are the ones who install the CT lasers on the guns that are sold together as a package. I have not called S&W yet, thought I'd put this on the forum to see if anyone else has any ideas. Thanks.