The result of over 50 years of performance and constant refinement, the latest Fullfield riflescope from Burris is the surest companion a hunter or shooter can have. The completely redesigned Fullfield IV, is rugged, lightweight, and most importantly reliable. Five Fullfield IV models are offered, each with an improved 4x optical system, wide selection of reticles, and premium multi-coated lenses for edge-to-edge clarity and low light performance. Fullfield IV riflescopes are built with nitrogen filled tubes and are waterproof, shockproof, and fog proof. They are built to handle recoil from all platforms including air rifles, slug guns, and high calibre rifles. Newly designed sleek turret knobs also allow easy finger adjustments.