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. The RML was designed for excellent weapon light holster compatibility and is made durable polymer and provides an IPX8 waterproof rating. One 1/3N lithium battery is included.FeaturesSingle visible laserUniversal picatinny rail mountTactile wind and elevation adjustmentsCompatible with most weapon light holstersDurable polymer housing