Gen 4 magazine catch on a Gen 3 23. I know I would have to make a slight modification to the frame of my Gen 3 23, but if I did that, would it just be drop-in like a regular magazine catch? I don't like having to shift the gun in my hand to release the magazine. Also, I almost have a blister on my thumb from having to press so hard on the release to get the magazine out. Any advice would be appreciated.