Did something very stupid...had both G35 and G23 broken down and cleaning. I wanted to see what the 35 barrel would look like on the 23 slide & frame. Of course the gun is locked up now and I cannot get the slide to more forward to release off of the lower receiver. I have to keep the trigger pulled get the slide to move at all, but it's hung-up on something and will not go forward enough to release the slide from the receiver. HELP?