I currenty own 4 Glock pistols; two M21's and 2 M22's. In one of the 22's, I average about 5000-6000 rounds per year. I was issued this gun as a carry gun in 2001. I can count on one hand the times it has malfunctioned, and all of those hiccups were user error. It will absolutely go bang every time, clean or dirty. I went through one training course were we shot 600 rounds before lunch, in the rain, and the only guns in the class that had zero trouble were the Glocks. With a Glock, the beauty is truly on the inside.