The new Reactor R5-R Gen 2 Red Laser Sights feature upgraded circuitry and other improvements from previous models. The affordable and versatile red laser is powered by two 1/3n batteries and comes standard with an INSTANT-ON ambidextrous custom microfiber IWB holster with automatic laser activation upon draw. No buttons. No squeezing. No doubt. Available for most leading and recently introduced compact pistols-including the latest from Ruger, Springfield Armory, Taurus and more..