NcStar VISM Pro Series Flip-Up Rear Sight

Features:

• Pro Series Flip-Up Rear sight is a low profile spring loaded rear back-up sight that flips-up and deploys with a push of a button.
• Rear sight low profile design folds flat to fit under the majority of scopes.
• Features an A2 dual aperture (large & small) that is fully adjustable for windage. Knurled windage knob makes adjusting the windage an easy task.
• Dimensions: 2.4″L X 1.2″W X 0.8″H
• Weight: 2.3 oz.
• Aluminum main body with steel A2 dual rear aperture windage knob and adjustment screw.
• Mounts onto Picatinny Mil-STD 1913 rails mounting tool included.
• US. PAT. 9976834