Vortex Diamondback Tactical 4-16×44

Great Scope ! Good bang for the buck ! Run it on an FAL
I've gotten to shoot a friend's XD-M OSP with the Vortex optic (I think it's a Venom? whatever the little one is) and it seemed like a solid optic. I don't think their that expensive.
I have owned quite a few Vortex scopes over the years and only had a problem with one of them. They replaced it no questions asked in a very quick turn around. For the money they are the optic I recommend to folks.