Just took a new Glock 19 with a Surefire X300 to the range and after firing the first round, I had a double feed malfunction. I fired about 200 rounds after that without any further malfunctions. This is the first malfunction I've ever had with any Glock (I own another G19 and a G26) but its also the first time I've attached a weapon mounted light on one. Does mounting a light increase the chances of a malfunction? Just concerned because I'm considering making this setup my primary HD gun.