I have a mil-spec NXS in 3.5-15x50 for sale. it's in mil/mil. with zero stop. it has a first focal plane reticle that i was told was made for the military. it's a velocity reticle for .308(175smk's at 2575FPS)It was made for the SEAL's and the MK11 with a 20" barrel, but if you run those numbers you could see what other calibers it matched up to. the reticle is set to meters not yards in reference to the 300-1000meter marks. it has the little upside down t's on the side of the reticle(see pic) that is supposed to match a man's chest or shoulders to range with. i'm selling the scope, sunshade, and bikini cover. it's in excellent condition. see pics for more info. there are some little scuffs on the glass that don't affect the image. i tried and tried to get a picture of them, but i could't get it to show up. $1700 shipped to your door. i'll do my best to answer any questions you have. merry christmas!