This is a AmeriGlo Sight known as the Bowie Tactical, model SW-801.
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 .140 wide post with white outline front
Green tritium 2-dot .155 wide U-notch with white outline rear
Fits all S&W M&P except Pro and L models
