Ade Advanced Optics Crusader 4-50&times;75 Rifle Scope with Iluminated Mildot, 34mm Heavy duty one piece main tube provides the foundation for precise lens alignment and other components Extended-range tactical riflescope with 4-50x magnification and 75mm objective lens Illuminated Mil dot Reticle: Red or Green The use of water resistant sealants, synthetic grease and secure O-ring seals protect against fogging 34mm tube diameter; includes mounting rings; matte black finish, Life time warranty