The VORTEX Diamondback 4-12x40 AO Riflescope, Matte Black w/Dead-Hold BDC Reticle (DBK-412B) is ideal for Big Game, Predator/Varmint, Muzzleloader, Slug, Long Range, and Target. Adjustable Objective (AO) provides maximum precision on small targets.

Vortex knows good hunting gets all the better with high quality optics. For that reason, Vortex makes sure every glass surface of the Diamondback is fully multi-coated to transmit 91% of the light - delivering the bright details you need when taking aim.

The solid one-piece aircraft-grade aluminum alloy construction makes the Diamondback riflescope virtually indestructible and highly resistant to magnum recoil. Argon purging puts waterproof and fogproof performance on the agenda, and advanced fully multi-coated optics raise an eyebrow when crystal clear, tack-sharp images appear in the crosshairs.

The Diamondback 4-12x40 AO Riflescope presents a new feature - zero reset accuracy. When you hunt with the Diamondback riflescope, you can count on fast, precise windage and elevation adjustments - with audible, tactile clicks at the tips of your fingers. Even more important is the fine machining of the metal-on-metal dials - guaranteeing accuracy for years to come.

Precision-Glide Erector System features premium-grade fluoropolymer teflon resin bushings that provide exceptional resistance to stress cracking, temperature change, corrosion, and friction-induced wear. In addition, these bushings have an ultra-low coefficient of friction for the smoothest possible operation of the magnification adjustment.

With a Diamondback riflescope on your firearm, you'll head out with complete confidence in the harshest of habitats. The Diamondback takes great strides against the abuse of repeated recoil with a rugged one-piece main tube constructed of 6061 T6 aircraft-grade aluminum and sets high standards for waterproofing and fogproofing with argon gas purging:

• Argon gas does not absorb or react chemically with water.
• Argon gas eliminates internal fogging.
• Argon gas maintains its protective properties over a wider temperature range.
• Argon gas does not diffuse as quickly as other elements, extending the service life of the optics longer.

Dead-Hold BDC Reticle was designed to eliminate the need for guessing hold-over at various distances. By selecting the appropriate sub-crosshair dot, a shooter will be able to hold "dead-on" his target at all reasonable distances. The BDC reticle is very versatile; use it effectively with a variety of firearms, including high powered rifles, rimfire rifles, black powder rifles and slug shotguns.

Vortex pledges this Very Important Promise to you, a Very Important Person, and that's why we call it the VIP warranty. In the event that your Vortex product requires service, no matter the cause, Vortex Optics will repair or replace the product at no charge to you.