Tenebraex Aimpoint M68 Ocular Flip Cover is built in compatibility with Aimpoint M68 optical sighting devices. The eyepiece lens cover safeguards the optic extremely well. Equipped with an instant access flip-up design, the cover for the ocular end easily flips up and out of the way at the time of action. It can be conveniently flipped back when not in use. The Tenebraex M68EC0-FCV is lightweight, durable and extremely useful for rifle scope users.