Competitive shooter Berry Dueck's Rapid Transition Sight now comes in two additional forms - tritium and fiber optic.
The tritium version has a larger dot at the front sight and two smaller tritium dots on rear sight. The fiber optic model comes in red, green, or yellow for front sight.
Tritium is priced at $332 and Fiber Optic at $288
http://www.surefire.com/tactical-equipment/rapid-transition-sights.html
From: Soldier Systems