Taking innovation to the next level, the new SVSS 10-50x60mm Mil-Hasyh will increase your brightness and provide superior clarity. Offering a 34mm main tube, enhanced travel allotment, locking turrets and Sightron's unique patent pending F.A.S.T. (Fine Adjustment Sight Tuner) Focus System are all components pushing the limits of no boundaries. Features Fast Focus eyebell allows for quick and easy adjustments when in the field SV Series Feature exposed large locking tactical style turrets that are 1.5" in diameter .05 MRAD adjustments Turrets pull up for windage and elevation adjustment and push down for locking Patent pending F.A.S.T. (Fine Mfg: Sightron, Inc.