Trijicon Tenebraex flip-up lens cover for 6x48 ACOG AC11020 is built to offer protection to your optic. It comes with an instant access flip-up design, and easily flips up and out of the way at the time of action. Besides, it can be conveniently flipped back when the riflescope is not in use. Lightweight, durable and extremely useful for rifle scope users, the Tenebraex AC11020 is made in compatibility with Trijicon ACOG 6x48 scope series. Trijicon 6x48 ACOG Tenebraex Flip-Up Lens Cover AC11020