The BSA® Sweet AO Rimfire Rifle Scope is specifically design for either the .17HMR (17-grain bullet) or .22LR (36-, 38-, and 40-grain bullet), and its turret is ballistically calibrated to match up with that exact cartridge. This 3-9x40 scope features fully coated lenses for a bright, crisp, up-close look at your target. Its zoom, focus, and 30/30 Duplex reticle combine for quick and easy target acquisitions. Built for rugged outdoor use, the BSA® Sweet AO Rimfire Rifle Scope features Climate Extreme Protection technology adds waterproof, shockproof, and fog-proof performance. Adjustable objective and 1/4-MOA reticle adjustment. Includes rings for dovetail rail and mount.