Remove error from the equation with the Vortex Optics Diamondback Tactical Riflescope. Find performance and durability with the Vortex Optics Diamondback Tactical Rifle Scope. It features a one-piece aluminum tube with a 4x optical system delivering you edge to edge clarity and unparalleled resolution. It is completed with a side adjustable parallax and a weatherproof build, giving you all that you need in a rifle scope.