Featuring a compact design to easily and securely fit full size pistols the Sightmark ReadyFire LW-R5 Red Laser Sight is ready for anything. The laser mounts between the trigger guard and muzzle of any railed full size handgun and at only 2.3 ounces it doesn�t add unnecessary weight to the firearm. Visibility extends to 20 yards during the day and an impressive 300 yards at night. The ReadyFire LW-R5 is energized by two AG13 batteries that can last up to seven hours. With easy to use slide switch activation the 5 mW laser is shockproof and extremely durable. Designed with a weaver/picatinny mount the ReadyFire LW-R5 has an operating temperature range of 0�F to 120�F making it the laser of your choice for almost every shooting scenario. - Visible red laser - Slide switch activation - Shockproof - Lightweight and compact - Fits full size pistols