Trijicon

Trijicon introduced the pistol rear sight mounted dot system liast year, and this year, they improved on the design. Newest version has fiber optc component that allows the sight to glow in daylight. Currently the only available dot color is green

Edit:

Trijicon also unveiled SRS, a Trijicon scope that does not use tritium, but LED. It uses both solar power and battery backup. The price will be $990 and will be available in June.

Adjustable LED RMR is a red dot for pistol and it will go for $629

There is battery powered ACOG.

New HD Night sight for pistols