The Vortex Diamondback 3.5-10x50mm Rifle Scope is ideal for when you spend time hunting in low light. These Rifle Scopes have pop-up dials that provide easy, precise adjustment for elevation and windage, making audible clicks that are easily and quickly counted. Vortex Optics knows good hunting gets all the better with high quality optics. The Vortex Diamondback 3.5-10x50mm Plex Rifle Scope is built around a durable 1" tube constructed of 6061 T6 aircraft-grade aluminum. All scopes are subjected to demanding factory testing under a force of 1000 G's 500 times! Not only is this rifle scope waterproof and fogproof, it is highly prized for its purging with Argon gas to eliminate internal fogging. Count on the Vortex Diamondback 3.5-10x50mm Shockproof Rifle Scope for smooth handling when the heat is on.