I got one of those Bushnell red dots with 4 different sight options; small dot, big dot, crosshair, and holo sight. Only red color though no green. It sits in my closet because I either use peep sights or scopes on all my big game rifles. I am planning on using it for a Turkey and small game shotgun for quick shots.
I have no problem putting a red dot on a muzzleloader. I don't shoot much past 100 yards with them, I just already have a scope mounted on the BP.