It is pretty easy. You only need to remove the yoke screw which is the foremost screw on the right side of the frame. Then when you open the cylinder you can slide the yoke and cylinder off the front of the frame. I used the existing ejector rod and ratchet as it was already fitted to the gun. The ejector rod is left hand thread and you need to be careful not to damage it when unscrewing it. Use a gripping tool with jaws padded with leather, wood, or brass. Or better yet buy an ejector rod tool from Brownells ($22.00) which is made for the purpose. I used the vise portion of a plumbers pipe flaring tool padded with rubber to remove mine, but ordered the Brownells tool for next time.