All of the reliability issues are in the magazines. They are a double stack design, and the problem is the rounds bind in the body. When I am loading them, even with the followers pulled all the way down, with no contact at all, the rounds stick to the sides of the mag and require force to load. The mag spring I thing just doesn't have enough strength to push against the friction of the rounds binding against the walls of the mag. I've never seen anything like this. I'm not sure if my mags are out of spec or if there is some magic lube I can use. Normal gun oil doesn't seem to work. The most frequent malfunctions are nose dives when the second round hasn't pushed the first one far enough up to clear the magazine, or when the mag actually closes on no round at all because none popped up in time.