One of the best - Leupold Mark 6 3-18x44mm Rifle Scope

I have several high end scopes, and this is by far one of the best I've owned. The clarity, along with the high magnification is perfect for my Sig 716. This is my second first focal plane scope, and won't be my last. Once you get your rifle sighted in, simply set the zero stop on both the windage and elevation, and you should never lose your zero, because you can always dial it back to where you originally set it.