Provides flattop AR-15-type rifles and carbines with fast, accurate back-up sighting. Rotating disk with four aperture diameters lets you select the right sight setting for quick, short-range engagements or precise, long-distance accuracy. Fully adjustable for windage, folds back down, out of the way when not in use. Rugged, all-steel construction; clamps easily to Weaver-style base or Picatinny rails on flattop receivers.
