So I finally see enough .223/5.56 ammo on the shelves to warrant buying a black rifle. Got an Olympic Arms 5.56, I think it was the Plinker Plus flat top variant. Next thing I need to know is what sights I should get for it. Any suggestions? My main focus would be for home defense so possibly an AimPoint red/green dot for short range work? EOTech Holosight is really outside my price range but there are other like sights of that persuasion. What do any of you suggest? I really don't want to and can't get permission (!) to pay more for the sight than I did for the rifle.