I've been using the trijicon night sights on the M4 platform for the last decade in various law enforcement applications from patrol in the southwest desert to investigations in the frigid upper midwest. Rock solid reliability, durability and easy to use. Wouldn't trade them for any optic. First time going with the green/orange configuration and prefer the green/green. The orange doesn't seem as bright to the eye for some reason but there's no mistaking which is the front sight and which is the rear.
Pros: Goof Proof Simple
This review was written in the old system and had content requirements that are different than reviews written today.