Hawke Sidewinder 8.5-25×42 20x ½ Mil Dot Hunting Scope 17120. has been designed with patented interchangeable turrets and extra-low dispersion (ED) glass. Turrets are easy to install and are available in 1?4 MOA, 1?8 MOA and 1?10 MRAD. The Sidewinder 30 SF riflescopes are all fitted with 1?4 MOA turrets. The Sidewinder 30 SF family offers three reticle options, two being different sizes of the popular Half Mil Dot reticle, the third being the SR Pro. The Sidewinder ED features the TMX reticle designed for ultra long-range shooting. Compatible with the Hawke X-ACT software, these reticles allow for your round and gun combination to be blueprinted against the reticle itself, making downrange accuracy easier to achieve than ever.