Each Nightforce NXS Rifle Scope has an objective lens assembly that focuses light rays more precisely for exceptional image clarity and color accuracy. Nightforce scopes also feature multi-coated lenses and convenient target turrets. The new Hi-Speed adjustments provide 10 MILs of adjustment per rotation, doubling the adjustment per rotation on previous models. Nightforce NXS Rifle Scopes must pass vigorous tests before leaving the factory in North Central Idaho so you are assured of getting a scope of the highest possible quality. Waterproof, fogproof and shockproof. Covered by a limited lifetime warranty.