Question, I have an AR-15 (not M16) with a Noveske 14.5" upper.

The Lower is an LRB Arms receiver with a Geissele super 3 gun trigger. I assembled the lower.

Today I shot 400 rounds. The rifle was clean at the beginning of the day. I was shooting prone from a bipod. At about shot number 350, the trigger failed to reset (i.e. a round was chambered but the trigger wouldn't move so I had to use the charging handle to eject the live round, cock the hammer, and chamber another round).

The next shot was an inadvertent two round burst. The next shot after that was a triple burst. Then I shot another 45 rounds or so without incident.

I have verified that the springs in my fire control group are correctly installed and are in good shape. Should I replace the FCG and/or send the Super 3 Gun trigger back to Geissele and let them know what's happening? Should I just take the gun to a good gunsmith?

To be honest it has done this a few times before as well - also when the gun was fairly dirty.

Thoughts?