The vanguard endeavor rs rifle scopes superb image quality is delivered through multilayer anti-reflective coatings for increased light transmission and optical designs using premium hoya ed glass.Featuring large fields of view, a rapid focus eyepiece and enhanced contrast combine to deliver a positive experience afield.The single-piece 1" tube is constructed from aluminum.Its hard, anti-scratch, anodized matte surface delivers a robust and ergonomic platform.The endeavor rs is sealed against dust and moisture, nitrogen-purged and recoil-resistant to provide a lifetime of dependability and success.Precise windage and elevation adjustments offer reset capability and accuracy with a locking side parallax system on certain models.Magnification: 3-9xObjective: 50mmTube Diameter: 1"Reticle: DuplexParallax Adjustment: SideProofs: Fog/Waterproof/Shock ResistantOptic Coating: Multi-Coated