The reticle can be changed, however, it costs more than buying a new Reflex.
Did Trijicon make a change to the coating of the Reflex housing?
Yes, in August 2011, we changed the coating on the Trijicon Reflex as part of a product improvement initiative. The current Reflex sights will have a black finish, while the older Reflex has more of a grey finish. Even though the color is different, both sights are authentic Trijicon Reflex sights.