Specifically designed for .17 HMR and .22 rifles, Bushnell Rimfire 3.5-20x36 riflescope with Multi-X reticle features Dusk & Dawn Brightness multi-coating, adjustable parallax, replaceable BDC turrets, multi-coated optics, one-piece tube, dry-nitrogen filled, 1/4 MOA windage and elevation adjustment, fast-focus eyepiece, and 100% waterproof, fogproof, and shockproof.