The Primary Arms PLx Rifle Scope is built for accuracy and durability. Fitted with Primary Arm's highest quality ED glass provides best-in-class clarity, color, and light transmission. The shockrproof design means this scope can take harsh punishment and hold it's zero during any situation you might find yourself in. Primary built the PLx with Steel-On-Steel (SOS) precision turrets for a lifetime of consistent adjustment and AutoLive motion sense illumination helping you save battery and removing the need to manually turn the optic on for every use. FeaturesUltra-Compact DesignSteel-On-Steel TurretsUML Compatible Throw Lever IncludedAutoLive Motion Sense Illumination