The ar optic scope features fully-multi coated lenses which deliver crisp images in every lighting condition.It utilizes a pcl lightning quick power which changes with the throw down pcl lever that can be customized with two different heights.The ar optic scope also has waterproof construction with nitrogen pruged fog-proofing.This 1-4x24mm model has a.30 mm tube diameter, illuminated btr-2 reticle, and black matte finish.Magnification: 1-4xObjective: 24mmField Of View: 112-27 ft @ 100 ydsEye Relief: 3.50"Tube Diameter: 30mmLength: 9.40"Weight: 18 ozReticle: Illuminated BTR-1Parallax Adjustment: FixedParallax Adjustment: FixedProofs: Waterproof, FogproofCoating Type: Waterproof, FogproofOptic Coating: Fully Multi-CoatedOptic Coating: Fully Multi-Coated