Convert a conventional daytime scope into a tactical-grade nightvision riflescope in mere seconds, without any re-zeroing. These rugged kits include your choice of a standard Leupold or Trijicon riflescope along with a lightweight nightvision attachment that mounts in front of it, centering on the objective. You receive a standard 7/8" weaver mount and an optional mounting system that couples the nightvision attachment directly to the objective. A die-hard case built to military specifications keeps the gear safe and secure. The nightvision attachment runs up to 20 hours with one 3-volt lithium battery. Cutting-edge image-intensifier-tube technology and all-glass multicoated optics provide long-range nighttime performance. Automatic brightness control regulates feedback from ambient light that can washout your sight picture; maintaining optimal contrast in variable light conditions, so you won't miss any crucial downrange action. At 640 grams, this attachment is one of the lightest and most compact in its class. Large 40mm eyepiece/output window. Simple one-touch activation. Available in Generation II and III models.