Sightron engineers gave the classic hunting / target riflescope a complete overhaul when creating the the Sightron S1 4-12x40mm AO G2 riflescope. Using modern optical designs and manufacturing techniques, the S1 4-12x40mm AO G2 provides clear and sharp views in just about any lighting due to Sightrons all-glass lenses and exclusive MC-333 lens coatings. Sightrons Precision Focus Eyepiece provides a customizable sight picture with extended eye relief. A compact, lightweight 1-inch aircraft aluminum tube houses an all-new erector tube system which is nitrogen charged, O-ring sealed, providing IPX7 waterproof and fogproof performance, and construction is 1,000G rated shockproof. All of this provides the ability to take the hunt to the field earlier and later than ever and handle whatever obstacles Mother Nature throws at you.