I have a g19 and a g26 and I have an extended slide release on both. the 26 is new (never fired) and I just put the extended release on it. Here is what I have noticed; with no magazine in the 19, I can pull the slide back all the way and it returns to the normal position without the slide release keeping it in the open position. I would have to use my thumb to "push" it up to the stop position. It does stay in the open position if I have an empty magazine in the gun. On my 26, everytime I pull the slide back all the way, with no magazine, the slide release will stop the slide and keep it in the open position, as if it had an empty mag in it. Which operation is correct? thank you so much.