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Vortex Diamondback Rifle Scope 4-12x 40mm Dead Hold BDC Reticle DBK-04-BDC
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$259.99
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SKU: DBK-04-BDC-875874001152
Overview
Built for hunters who want a versatile scope for close-to-midrange shots, this 4-12x optic pairs a 40mm objective with a Dead Hold BDC reticle for practical holdover use in the field. The 1-inch tube, 3.1-inch eye relief, and 32.4-11.3 feet field of view at 100 yards give it a straightforward setup for general hunting applications. Fully multi-coated optics and Argon gas purging are included, along with pop-up windage and elevation dials and protective lens covers. At 12 inches long and 14.6 ounces, it keeps the package compact without adding unnecessary bulk.
Why Hunters Choose the Vortex
4-12x Magnification
Flexible use across close and
40mm Objective
Lens supports a practical balance
Fully Multi-coated
91% light transmission
Argon Gas
Purging helps reduce internal fogging
Pop-up Windage
Elevation dials allow faster adjustment
Key Features
- 4-12x magnification with a 40mm objective lens for versatile hunting use.
- Dead Hold BDC reticle for straightforward holdover reference.
- One-piece aircraft-grade aluminum alloy construction.
- Argon gas purging helps eliminate internal fogging.
- Fully multi-coated optics transmit 91% of available light.
- Pop-up windage and elevation dials allow fast, easy adjustments.
- Includes protective lens covers.
Best Used For
- Hunters wanting a versatile 4-12x scope for close-to-midrange shots in varied terrain.
- Rifle owners who need a 40mm objective and 1-inch tube for a compact setup.
- Users shooting in changing weather who value argon purging and fog resistance.
- Hunters making quick elevation and windage adjustments with pop-up dials.
- Those seeking a scope with included protective lens covers for transport and storage.
Specifications
| Construction | Solid, one-piece aircraft grade aluminum alloy construction |
|---|---|
| Eye Relief | 3.1 inches |
| Field Of View | 32.4-11.3 feet/100 yards |
| Gas Purge | Argon gas purged |
| Length | 12 inches |
| Light Transmission | 91% of available light |
| Magnification | 4-12x |
| Objective Lens Diameter | 40 mm |
| Optics Coating | Fully multi-coated |
| Parallax Setting | 100 yards |
| Protective Lens Covers | Included |
| Reticle | Dead Hold BDC Reticle |
| Tube Size | 1 inch |
| Weight | 14.6 ounces |
| Windage And Elevation Dials | Pop-up for fast and easy adjustments |
Pros
- 4-12x magnification offers flexible use across close and mid-range hunting shots.
- 40mm objective lens supports a practical balance of light gathering and size.
- Fully multi-coated optics are listed with 91% light transmission.
- Argon gas purging helps reduce internal fogging across changing temperatures.
- Pop-up windage and elevation dials allow faster adjustment handling in the field.
- One-piece aircraft-grade aluminum alloy construction adds a durable, recoil-resistant build.
Considerations & Trade-offs
- The 4-12x magnification range is versatile, but it is not a dedicated low-power or long-range specialist setup; it sits in the middle for general hunting use.
- The 40 mm objective and 1-inch tube keep the scope compact, but they also define the scope’s overall size and mounting requirements.
- Parallax is set at 100 yards, so this scope is configured around that distance rather than offering user-adjustable parallax settings.
- The included lens covers add protection, but they are an accessory rather than a built-in solution, so they still need to be managed in the field.
Suggested Comparisons
- Fixed-power rifle scopes
- Higher-magnification hunting scopes
- BDC reticle scopes
- Compact 1-inch tube scopes
Suggested Accessories
- Rifle scope rings
- Scope mount
- Lens cleaning kit
- Protective scope cover
Frequently Asked Questions
What magnification range does this scope offer for hunting use?
It has a 4-12x magnification range, which gives you lower power for closer shots and higher power for more precise aiming at distance.
Does the scope include any features to help with fogging in changing weather?
Yes. The scope is purged with argon gas, which is stated to eliminate internal fogging and help maintain its protective properties across a wide temperature range.
What reticle does this model use?
This model uses the Dead Hold BDC reticle, as listed in the product title.
Are the adjustment dials easy to use in the field?
The windage and elevation dials are described as pop-up dials for fast and easy adjustments.
What comes included with the scope?
Protective lens covers are included.