The Viridian C5 is so tiny, it tucks neatly between trigger guard and muzzle, with no overhang, and will work with virtually any railed gun. All conditions-visible Viridian Green Laser. Combined with the TacLoc ECR Instant-On Holster- the package is complete- batteries included. Drawing the Viridian from the TacLoc ECR Instant-On holster releases it smoothly and instantly ignites your laser automatically, the second you draw. It's the most advanced, most effective carry setup you can get. The RADIANCE® taclight technology gives you a wider beam of light, illuminating over twice the horizontal area. With no wasted light above or below your target area, you get a better picture, faster discovery, smoother tracking and more positive targeting than any other weapon-mounted tool.