VISM 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. Low profile design folds flat. Features an A2 post adjustable for elevation, and an aluminum main body and steel post, and adjustment screw. Weighs only 2oz. Mounts onto Picatinny Mil-STD 1913 rails, mounting tool included. (Gun pictured not included). #VMARFLF