Quote Originally Posted by USGI View Post
Look to see if your trigger pin is being tightly held in place by the width of the opening in the stock. If it slips just enough to allow the pin to disengage the trigger housing at one end, what you've shown can happen
Thanks. I'll give it a look. Are you suggesting stock inletting might be loose enough the pin could slip out partway? I suppose the pin's hole could be sloppy enough to cause the same issue too. I haven't been able to reproduce by hand...so maybe it's the jarring of the recoil jiggles the pin.