This Razor HD LH rifle scope is an excellent option to crown your rifle. It features HD (high density) glass, premium proprietary coatings to provide the maximum light transmission, argon gas-purged and o-ring-sealed for fog proof and waterproof performance, rugged construction to withstand recoil and impact and it is constructed from a solid block of aircraft-grade aluminum for strength and rigidity. Along with all these features you will also receive the same no-nonsense lifetime warranty you would expect from any of Vortex's products.