I recently ordered the CGW striker. Nothing was wrong with the factory one, I just did it for the upgrade and to have a spare. So I take the slide off, got the endplate slid off and replaced the striker no problem. Now I'm excited to see if maybe there is a slight improvement on the factory trigger. Not that it wasn't already good. So I put the slide on and rack it. Wow, that was different. Something isn't right. In my excitement I didn't install the barrel and recoil spring before putting the slide back on. Now I had to fool around for a while to get the slide back off. I'm still not sure what I did to get it back off but it was a pain to do. I won't do that twice.