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 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.