Infrared cameras; infrared optical detection apparatus; Telescopic sights; Telescopic riflescopes; Optical apparatus and instruments, namely, Telescopic riflescopes; Apparatus providing night vision, namely, night vision goggles; Digital video recorders; Monocles; Rifle scopes; Electronic telescopic gun sights; Gun scopes; Infrared devices for aiming weapons in the nature of infrared gun scopes; Infrared gun sighting apparatus in the nature of infrared gun scopes