Dueck Defense has released another new RBU variation. This one is very much like the original RBU for mounting a Trijicon RMR to a Glock but it has 2 dot tritium night sights embedded in the sights. The tritium vials are configured in a dot-over-dot configuration with one vial in the front sight and one in rear. This is a limited edition.
Check out the RBU 2 Dot Tritium at Dueck Defense.