Leupold 115943 Mark 6 Tactical Mount Rifle Scope 3 to 18X Magnification 44-Millimeters Black
http://www.amazon.com/gp/product/B00AU69VI6?tag=sukses2015-20
Impressive 6 to 1-zoom ratio with clear images from edge to edge
Xtended Twilight Lens System
DiamondCoat 2 lens coating provides the highest level of scratch resistance
Front Focal Plane for easy estimation of range at all magnifications