The Viridian HS1 M-Lok Hand Stop with Integrated Laser is a hand stop that is seamless with no messy wires. The highly visible laser is intuitively activated by the grip of the support hand and offers increased control and cuts you gives you an edge in close quarters. Night Vision users now have a distinct advantage with the addition of the HS1 IR. The infrared laser is invisible to the naked eye but shines bright with Night Vision Goggles. FeaturesVisible or IR laserSeamless design with no messy wiresIntuitive activated by the grip of the support handPicatinny rail adapter included