Shot it today for the first time. Put about 700 rounds of all kinds of bulk through, not a single malfunction of any sort. Cleaning was somewhat of a pain to get down into the feeding area, but can be taken down past the point I did. I did what someone else said regarding the spring tensioner - tightened it all the way for high velocity - worked I guess. Very satisfied with my purchase. Oh, and I put a red dot on to start, and hit bullseye first 2 shots at about 30 yards.