This Leupold FX-II Handgun 4x28mm scope with Duplex reticle features multicoat4, xtended twilight lens system, diamondcoat2, 2nd generation argon/krypton waterproofing, twin bias spring erector system, super fast-focus eyepiece, lockable fast-focus eyepiece, classic/standard lockable eyepiece, standard multicoat, micro-friction 1/4 MOA, tactile power selector, proprietary nitrogen fill process, 6061-T6 aircraft quality aluminum, and standard power selector.