Use bought a G23 on Sunday thus completing my little family of .40 cals. I have a G22 Gen 2 and a G27 Gen 4. This G23 is a Gen 4 with night sights. Now need to decide whether to start modding what's have or save up to start my next family in maybe .9mm? Or should I replace the Gen 2 G22 with a Gen 4? What do you guys think!