Locking feature on both elevation and wind age turrets allows you to simply pull up the turrets to Dial and push down the turrets to lock them in place The illuminated reticle provides greater visibility during dusk and dawn and other low ambient light environment Argon purging uses the inertia gas with bigger size molecules to purge any moisture out of the tube giving you better waterproofing and thermal stability Fully multicoated optics effectively reduces reflected light and increases the transmission of light giving you a Brighter image than Normal single coated lenses 1 MIL clicks and 10 MIL per revolution, and the elevation turret adjusts up to 32 MIL, while the windage turret adjusts up to 25 MIL. The scope uses an AHMR2 FFP (first focal plane) MIL reticle with etched glass, and you get a center dot with curved lines around it, plus hash marks to the left and right and a Christmas tree style part at the bottom with dots and holdover marks. You can adjust the turrets with . First-focal-plane APRS2 MIL reticle; HD glass; true zero-stop turret; 34 mm tube; detachable throw lever; sunshade & flip caps; 10-MIL/25-MOA turrets; 25.7 oz Athlon Optics Helos BTR GEN2 APLR6 4-20x50, First Focal Plane, MIL... Athlon Optics - Hunting, Shooting, Airguns, Scopes, Camo Clothing Store GEN2 10-40x56 Athlon Argos SF IR 6-24x50, First Focal Plane Athlon Helos Btr Gen2