I would not buy a "night scope". A far superior setup is a "UNS" (universal night sight) that installs IN FRONT of a day scope. Zero change is minimal and NOTHING changes to your day zero. Litton of course is top-shelf but Armasight has an off-shore copy that I've used and was impressed by. As always, more money buys a higher grade image intensifier. The current top-grade Armasight equals 7-8 year old Litton stuff, IMO.