The Classic 3-dot design is the most popular among personal defense, military, and law enforcement users. These sets feature a horizontal alignment of tritium dots inside bright white outlines. Features : "Green tritium" .125" wide post" white outline front" "Green tritium 2-dot" .150" white outline square notch rear" GLOCK is a registered trademark of GLOCK Inc. 3CR Tactical is not affiliated with, endorsed by, or sponsored by GLOCK Inc. Any reference to GLOCK products is for identification and compatibility purposes only.