This mount rail attaches to your pistol's below-the-barrel Weaver mount typically used for lasers, swinging around the right-hand side of the gun and above the barrel for mounting any Weaver-mount scope/sight/accessory you can imagine.

Universal pistol weaver style rail- fits on most pistol accessory rails to provide a solid weaver style platform.
Weight: 3.50 oz.
Length: 5 inches
Height: 3 inches