Midwest ERS Flip-Up Rear Sight

A2 style dual aperture, fully protected from accidental damage Thick rugged pivot ears, twice as thick as the competition Made from 6061 aluminum, mil-spec hard coat anodized Locking detent with double the locking surface, for maximum strength Same style windage knob as on the standard M-16, & M-4 rifles Made in the U.S.A. with Lifetime Warranty