I have my XD40 service (OD frame) and i have noticed that with my M3 thta after about 3-6 rounds it will fly off. It does this whether using the momentary switch or the constant switch. I look at the attaching lever and notice it has some play and doesnt look like it is seated enough. yet with a good tug and messing with it after attachment it feels fine and secure. I also use a QD LASERLYTE and have no problems with that (its pretty damned good) and was going to get a M6 but with this kind of a problem with the M3 i am a little hesitant. Almost want to wait for the XML2 to come out. Anyways has anyone else had a problem like this or know what could be causing the problem. The rail is fine. no landing or grooving of any type other than the normal little wear from attaching anything on there. They are both about a month old. The M3 mounts perfectly onto my USP. Is it just the size of the notch or is there something else to it. any suggestions would be appreciated.