While the average parallax wheel will simply provide an estimation about a given distance (200 m/yds will be anything between 190 m/yds and 210 m/yds) the exclusive system of the Armada models is spot-on and flawless with every single measurement instead (200 m/yds will be 200 m/yds, with the same precision of a laser rangefinder). a deg 30mm Tube a deg Engraved Reticle With Dual Illumination a deg Locking Turrets (Push-pull) a deg Precision 1/8 MOA Adjustments a deg Fully Multi-coated Optics a deg Fast Focus Ocular a deg Waterproof, Shockproof, Fogproof a deg Patented Parallax Wheel For Supremely Accurate Measurements Of Shooting Distance a deg Anti-canting Bubble Level