The new P-22 Series riflescopes is the Rimfire optimized variant of Nikon’s growing line-up of precision optics for AR rifles. It offers a BDC 150 Reticle which was developed specifically for the trajectory of the .22 Long Rifle Rimfire round. The new BDC 150 reticle also offers shooters unique open circle aiming points 50 to 150 yards. The 50-yard Parallax Setting eliminates parallax for precise shooting. Positive click reticle adjustments get you zeroed in quicker and maintain your setting—even with heavy recoil. To simplify field adjustments, Nikon has integrated the Zero-Reset Turret Feature into all new riflescopes. Just sight-in as usual, then lift the spring-loaded adjustment knob, rotate to your “zero”, and re-engage. Field adjustments are now as simple as dialing-in your subsequent ranges. And, as you'd expect, this scope has been treated to be water/fogproof.