The bsa sweet.22 ao compact provides all the features of standard sweet ao scopes in a package designed specifically for the ruger 10/22 and other small frame.22 rifles.Complete with 3 ballistically calibrated turrets for 36gr, 38gr and 40 gr cartridges.The sweet 22 ao compact also features an adjustable objective, fully coated lenses, 30/30 reticle and all aluminum construction.Includes dovetail rings. Adj Size: .25 MOA Magnification: 4-12x Objective: 40mm AO Field Of View: 10 - 40 ft @ 100 yds Eye Relief: 4" Tube Diameter: 1" Length: 12.20" Weight: 21.80 oz Reticle: 30/30 Duplex Parallax Adjustment: 7.5 yds-Infinity Proofs: Fog/Shock/Waterproof Coating Type: Waterproof, Fogproof, Shockproof Optic Coating: Fully Multi-Coated Optic Coating: Fully Coated