AirForce 4-16x50 AO Rifle Scope, Mil-Dot Reticle, 1/4 MOA, 1" Tube Full-size rifle scope 4-16x magnification 50mm objective lens (adjustable objective) 1" tube 1/4 MOA (1/4" click value @ 100 yds) Mil-dot reticle 10 yds to infinity parallax adjustment 33' to 7' field of view @ 100 yds 3.3" to 2.3" eye relief Nitrogen filled Fully coated lenses Shockproof, fogproof, and waterproof 19.5 oz. 14.1" long Includes lens caps