Crimson Trace Rail Master Universal Rail Mount Light (Black)
http://www.amazon.com/gp/product/B007U5OJQO?tag=sukses2015-20
Instant Activation Just tap on and tap off
Fits most M1913Picatinny and Weaver style accessory rails on pistols rifles and shotguns
Once you lock it on it will not move thanks to advanced Secure-Lock Technology
100 Lumen LED White Light with 2 Hour