RML Laser Sight with Picatinny-Style Mount Matte. Universal picatinny rail mount. Tactile wind and elevation adjustments. Compatible with most weapon light holsters. The Holosun RML Laser Sight is a single emitter pistol laser that features excellent zero retention with tactile and audible windage & elevation adjustments and universal picatinny rail compatibility. One 1/3N lithium battery is included. A great little device on a 22 rifle that makes shooting at night a fun experience. It is soo easy to install and is very easy to operate with just the tap of your trigger finger while drawing your weapon. The green dot is very visible, even in bright sunlight. I like it much better than the Holosun 507K red dots that I have on my other pistols. Midway has the best price and it was AVAILABLE! This laser is very much worth the price. ALL MANUFACTURERS WARRANTIES WILL APPLY! All of our products are. In the box; and contain all of the parts.