The Crimson Trace CTS-1520 Red Dot combined with the Dovetail mounting kit features an intergrated rear sight for use with front iron sight; adjustable windage and elevation; RAD micro footprint; recessed optic lens for increased durability; ambient light sensor automatically adjusts the aiming dot's brightness to the surrounding lighting conditions and battery access on bottom. Low profile adapter plate slides into existing dovetail for easy adaptability. Includes battery and plastic sight cover. Compatible with S&W M&P/M&P 2.0 full size and compact/Shield/Shield Plus/Shield EZ/Glock full size and compact.