(originally posted by Riss) This method would not work with something like a CZ-75. The slide is not tall enough and there is not enough to grasp. But for the Glock it works well.
I grab the slide serrations from the back of the gun with my thumb and my pointer finger at a 90 degree angle or less with my big knuckle as the axis and the end of my pointer finger faced backwards towards me so the side of my finger is on the serrations. this lets my thumb grip the serrations and my pointer finger get the most surface area possible on the serrations to grip it and slide it back. I had troubles at first because I was used to a 1911 slide (BIG difference!)