All of my handguns and my 300 Blackout AR pistol have green dots. I have an astigmatism so red dots tend to have starburst effects. Plus my eyes catch green much faster as well so they work better for me. The only optic I have that isn't green is the LPVO on my 5.56 AR and that's cuz Vortex doesn't make a LPVO that has a green illumination