NcStar VISM Pro Series Flip-Up Front Sight

Features:

• Pro Series Flip-Up Front sight is a low profile spring loaded front back-up sight that flips-up and deploys with a push of a button.
• Features an A2 front sight post that is fully adjustable for elevation.
• Front sight height is designed for handguard rails monolithic receivers and gas blocks that are at the SAME height as the AR receiver Picatinny rail.
• Dimensions: 2.4″L X 1.1″W X 0.8″H
• Weight: 2.0 oz.
• Aluminum main body with steel A2 front post.
• Mounts onto Picatinny Mil-STD 1913 rails mounting tool included.
• US. PAT. 9976834