The Nightforce ATACR 5-25x56mm Riflescope w/ ZeroStop - .1 Mil-Radian - Mil-R Reticle, C446 assemble from the incredible NXS and actualizes key highlights. The ATACR highlights a shorter 14.3" length, a more powerful 34mm tube, 34.9 Mils of height modification (20% increments from NXS) and a more extensive field of perspective with expanded flexibility.