I haven't been on the forum in quite some time. Feels good to be back. I decided to take a break from Glock Talk and bring forth life into the world. Now that my daughter is 2 years old I need to relieve some stress and have some fun (Terrible 2's is not a Myth). So I'm determined to do my first GSSF shoot this upcoming year. Anyhoo I'm trying to catch up on some of the wonderful posts I missed and I see a lot of talk about different sites. If I remember correctly when I purchased my G21SF I received it as is, but when I purchased my G19 I think they put night sights on it if I remember correctly. I know they glow green in the dark. Now I'm reading about all these other different type of sites and it has me thinking, should I look into replacing the one's on the G21? Is there a thread/post with information about the different kinds of sights and the benefits of having each kind?