I have a DUL that is currently awaiting a shipping label to go back to S&W due to multiple fte's. Went to the range this past Thursday and shot about 300 rounds and had 4 to 5 fte's every mag including one that was slammed long ways into the polymer of the upper that made a nice gouge in it. My friend also has a MOE serial #DUL and he had the same problem and sent his in. He got it back Monday and had not a single issue so I'm hopeful I'll have the same results once it's returned.