NcStar AR15 Flip Up Rear Sight (MARFLR)

For a durable and compact Flip-up rear A2 iron sight the NcSTAR MARFLR is the AR-15 back-up rear iron sight that you're looking for. Features: - precision made Flip-up A2 rear sight. The MARFLR will fit virtually all AR-15, M4, and M16 Flattop Picatinny rail upper Receivers. - A2 rear sight Assembly with large and small rear aperture. A2 rear sight is fully adjustable for windage with knurled click adjustable controls. - large steel thumb nut and precise rail clamp for positive & secure attachment to your upper receiver. - with the MARFLR Flip-up sight folded down, it's 1 7/8 length x 11/16 height (mount height) & 1 1/16 height (A2 sight base when folded)