Fullfield TAC 30mm scopes are up to the severe duty requirements put upon them by hardcore shooters. These scopes feature excellent quality lenses and the highly efficient index-matched HiLume multi-coating on every lens surface to assure a bright, clear and high-resolving sight picture. Each main tube is constructed of aircraft-grade 6061T6 aluminum. Double-spring tension and an oversized ball-joint secures the hand-fitted internal zoom assembly. The adjustment systems are positive, repeatable, steel-on-steel, with audible clicks. The bottom line is unfailing shot-to-shot accuracy, no matter how extreme the conditions or how heavy a magnum with which the scope becomes partner. Each scope is moisture-purged and injected with laboratory-grade nitrogen before the one-piece outer tube, one-piece eyepiece/ power ring and the Burris-exclusive quad seals take their turn in keeping it that way. TAC-2 Low Profile Knobs are easy to operate, very reliable, and are resettable to zero once sighted in. These scopes are welcome on long hikes, weighing in at 25% to 50% less than many other scopes in their class. Each Fullfield TAC 30 carries the famous Burris Forever Warranty.