I just bought Tru Glo sights for my new 20. I have a hard time with stock or small sights [my eyes]. on my other SD Glocks I have Big Dots but the 20 is going to be my woods gun so I needed different sights. I found the TG sights on E-bay for 43.00 shipped. I got some fiber optic steel sights pretty cheap so if I don't like them I'm not out much.