Gruntproof scope - Trijicon VCOG VC18 1-8x28mm Rifle Scope, 34 mm Tube, First Focal Plane (FFP)

This thing is build like a tank. The only reason it does not get 5 stars is the weight of the optic. I can see why the USMC chose this particular scope. If you run out of ammo in a fight, you can take the scope off the rifle and use it as a club! As a comparison, think of an ACOG, then apply that quality of build and toughness to a 1-8x scope. That is this VCOG. Not the lightest optic, but definitely built to take a beating and keep a zero. Great clarity and the magnification dial is super smooth. I also like that it takes AA batteries.