I have a BM DCM lower that was purchased new 2 years ago and is in pristine condition. It truly has seen very little use until just recently when I decided to use it (and the nice 2 stage trigger) as the lower for my "3-gun" match rifle. I was sighting it in at the range, using a rifle rest and bags, and it "double tapped" on me. I assumed I had a slam fire and continued. A couple rounds later it fired a 3 round burst! And that's because there was only 3 rounds left in the magazine. I was being very ginger on the trigger because it was for sight it. There was a definite break between stages, however, as I continued back slowly on the second stage it released into the bursts mentioned above. Ammo was PMC target (similar PI to my black hills). Rifle was clean and no other malfunctions were noted prior to or after the burst. Obviously, I will contact BM customer service but if there is any help you can provide here, I would appreciate it. Anyone else?