The new BLACKHAWK! folding rear BUIS is a folding rear sight designed to be compatible with standardized AR systems. This rear sight works in conjunction with standard front sights. With a push button actuated spring deployment this sight can be flipped up into action in a heartbeat and folds down when it's not needed.

Features and Specifications:
Manufacturer Number: 71BU01OD
Optimized for the AR platform
Same plane sight height
Compatible with mil-spec height front AR sights
Single hybrid aperture
Locks into stowed position with push button spring deployment
Aluminum sight blade and aperture
Polymer base
Olive Drab Green