For optimal situational awareness, the 1x magnification provides a super wide field-of-view and the natural ability to best use both eyes. Set the scope at 4x power and engage targets out to 600 yards. Burris Fullfield TAC30 scopes are incredibly bright and rugged enough to handle the rigors of tactical work and mid-range precision. Precision, accuracy and reliability at a value any operator or LE department can afford. For even greater versatility, the 1x-4x is available as a package with the popular FastFire red dot reflex sight.