Solid, tough and bright, the Vortex Crossfire II 6-24x50mm AO Rifle Scope impresses with quality performance. These Rifle Scopes engineered by the experts at Vortex Optics features long eye relief, a fast-focus eyepiece, and fully multi-coated lenses to increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. The Vortex Crossfire II 6-24x50mm AO Shockproof Rifle Scope has a hard anodized single-piece aircraft-grade aluminum tube that is nitrogen purged and O-ring sealed for waterproof/fogproof performance. The Vortex Crossfire II 6-24x50mm AO Waterproof Rifle Scope will maximize alignment and improve your accuracy every time.