Burris 4.5-14x42mm Fullfield II Ballistic Plex Riflescope is a variable power riflescope with 1-piece tube construction and reinforced quad-seal gas seals. It has multi-coated lenses, adjustable objective, and a Ballistic Plex reticle that automatically compensates for bullet drop from 100 to 500 yards. Additional features include water, fog and shockproof construction, 1 inch tube diameter, and hunter turrets. The Fullfield II is lighter and better sealed than the original Fullfield model.