Designed with the mindset of changing the rules when it comes to you get what you pay for", the solid construction, waterproof and fogproof performance with argon gas purging, and advanced fully multi-coated optics of the Diamondback riflescope raise an eyebrow when crystal clear, tack-sharp images appear in the crosshairs. KEY FEATURES: Fully multi-coated lens coatings on all air-to-glass surfaces increase light transmission. Second focal plane reticle: scale of reticle maintains the same ideally-sized appearance. Listed reticle subtensions used for estimating range, holdover and wind drift correction are accurate at the highest magnification. Single-piece 1-inch tube construction maximizes alignment for improved accuracy and optimum visual performance and ensures strength and waterproofness. Shockproof construction from a solid block of aircraft-grade aluminum for strength and rigidity. Withstands recoil and impact. Waterproof with o-ring seals to prevent moisture, dust and debris from penetrating the riflescope for reliable performance in all environments. Fogproof with argon gas purging to prevent internal fogging over a wide range of temperatures. Hard anodized finish provides a low-glare matte surface. ArmorTek ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. Capped reset turrets allow quick re-indexing of the turret (no tool needed) to zero after sighting in the riflescope. Caps provide external protection for turret. Fast focus eyepiece allows quick and easy reticle focusing. VIP Unconditional Lifetime Warranty."