The UNS-LR A2™ clip-on Weapon Sight (WS) is an improved version of the AN/PVS-30. It adds the latest high performance white phosphor Gen 3 light intensification night vision to most rifles and day scopes by attaching to the 1913 rail. The refractive lens provides high lowlight performance in a lightweight design. Knight Vision patented technology assures the accurance of your range-tested day scope. The extended focus lever makes the product easy to use from the shooting position.