I took my son out yesterday to shoot my 6920 with a Geissele trigger installed, at the range somewhere around the 60th to 70th round down range it double tapped, my son was shooting (19 years old) when it happened and of course when I heard it got my attention so I started watching him and the rifle closely and then 4 or 5 rounds later it did it again. I asked him if he was just pulling the trigger quickly, he stated no it just happened. It occurred at the end of our range time so we packed up and headed to the house I figured I would break it down tonight and have a look.
Background, I installed the Geissele trigger a couple of months ago (when I get the house I'll add the model number) and since then I've put 200 to 300 rounds down range prior to this with no problems it shot like a dream. I was planning to disassemble and clean the gun, but those of you with more experience with this sort of thing what should I be looling for or what mistake might I have made installing the trigger. Now I'm not new to AR's I've had several over the years and installed several after market triggers but I've never had this happen. Thanks in advance.