The bsa sweet 450 bushmaster ao rifle scope is specifically designed for the 450 bushmaster cartridge.Complete with three ballistically calibrated turrets for 245gr, 250gr and 260gr cartridges.The sweet 450 bushmaster ao features an adjustable objective, fully coated lenses, 30/30 reticle, aluminum construction and matte black finish.Includes 2 pc.Weaver rings.Magnification: 3-9xObjective: 40mm AOField Of View: 11.50 - 34.20 ft @ 100 ydsEye Relief: 3"Tube Diameter: 1"Length: 12.13"Weight: 22.30 ozReticle: 30/30Parallax Adjustment: 7.5 yds-InfinityProofs: Fog/Shock/WaterproofOptic Coating: Fully Multi-Coated