Viridian HS1 Hand Stop Laser M-LOK Mounted 5mW Green Laser with 100 yds Day/2 mi Night Range & Flat Dark Earth Finish for AR-Platform Viridian's HS1 is the worlds first AR hand stop with integrated laser sighting device. Utilizing M-Lok mounting, grip activation buttons, adjustable windage and elevation, and an ergonomic design, the HS1 is the perfect accessory for your tactical firearm. The uniquely placed pressure activated button makes the HS1 ideal for use on AR-style firearms as the laser can be activated when the shooter is using a variety of grip styles. The shooter gets all the protection of a hand stop while utilizing a highly visible green laser sight for aiming.