The Black Jager 34 mm Scope Bubble Level is a precision optical accessory designed to eliminate cant (tilt) error when mounting or using a rifle scope. It attaches directly to a 34 mm scope tube and provides a clear, alcohol-filled vial to visually indicate when the scope (and rifle) is perfectly vertical. Use of this level helps maintain shot consistency, especially at longer ranges, by preventing drift due to cant.
Key Features
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Designed for 34 mm scope tubes — fits directly onto a standard 34 mm outside-diameter scope body.
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Alcohol / spirit-filled vial — the bubble is free to move and stable under temperature variation.
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Machined aluminum body — durable and lightweight, typically anodized in matte black for corrosion resistance and low reflectivity.
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Low-profile design — built to minimize interference with turret knobs, rings, or accessories.
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Single-bolt or hinged mounting — easy to install or remove without full disassembly of your scope setup.
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Clear, high-visibility bubble — ensures you can see the bubble in many lighting conditions.
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Precision alignment — aids the shooter in ensuring vertical alignment before each shot, reducing cant-related horizontal errors.
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Lifetime warranty / guaranteed quality (if offered by manufacturer)
Example Specifications (typical for similar 34 mm models; adjust to your unit)
Spec | Typical Value |
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Tube size | 34 mm |
Material | Aircraft-grade aluminum (6061 or similar) |
Finish | Hard-anodized matte black |
Weight | ~ 10-20 g (0.3-0.7 oz) |
Length / footprint | ~ 50–60 mm (length) × ~ 8–10 mm width, depending on model |
Profile height | Low to moderate — designed to avoid interfering with knobs |
Mounting method | Single clamp bolt, hinged ring, or open-top clamp |
Liquid Type | Alcohol / spirit-based |
Bubble sensitivity | Fine — responds to small tilt angles |
Operating temperature range | (Not always stated) — typical for aluminum & spirit vials: –20 °C to +60 °C (approx.) |
Warranty | Manufacturer-dependent (some offer lifetime) |
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