Hawke Sidewinder 30 Tactical Rifle ScopesFree Lens Covers, Sunshade, and Detachable Parallax Wheel These Tactical Hawke Scopes are a derivative of the Hawke Sidewinder 30 series but they're not the same. Foremost among the differences are the reticles. Hawke developed a special "1/2 Mil Dot" reticle with markings between the dots. These 1/2 mildot markings lend themselves nicely to ballistic trajectory programming by the free Hawke Ballistic Reticle Calculator software. It calculates aimpoints on the reticle for different distances. We've posted extensive descriptions, videos, specification charts, and links to several versions at our Hawke Sidewinder 30 Web Page. But a quick run down is this: Hawke Sidewinder 30 Tactical has a 30mm one piece tube construction for strength and broader adjustment range. It has a side focus parallax adjustment. Large, exposed target knobs have a push-pull locking capability. Locking fast focust Eyepiece. The reticle can be illuminated red, green, or black. FREE Accessories... Every Sidewinder 30 Tactical Riflescope comes with free screw-on metal lens covers, a free screw-on sunshade, an extra 2" oversize sidefocus knob and vernier for fine tuning parallax, all packed in a beautiful hard carrying case.