ERATAC ACI Holder with Bubble Level D30 and D34 – Angle Cosine Indicator and Bubble Level Holder for precise distance setups
In steep terrain and over long distances, angle and cant can lead to real shooting errors.
The ERATAC ACI Holder with Bubble Level D30 and D34 is an ERATAC holder or angle cosine indicator/bubble level module for optic mounts and precise distance setups.
An ACI or a bubble level does not calculate or shoot for you. Angle information and rifle position must be correctly implemented in ballistics, aiming point, or turret adjustment. Variants and dimensions must match the existing rail, mount, or platform: standard version.
Important note for classification:
An ACI or a bubble level does not calculate or shoot for you. Angle information and rifle position must be correctly implemented in ballistics, aiming point, or turret adjustment.
Before purchasing, check: interface, mounting position, visibility when shouldering, compatibility with the existing ERATAC/Picatinny base, tools, and actual intended use.
What makes this product technically special:
✔ Angle control: helps with uphill or downhill shots where horizontal distance is crucial.
✔ Bubble level: makes cant visible and reduces lateral deviation caused by tilted rifle position.
✔ Mount-close system: sits close to the optic and is easier to control when shouldering.
✔ UNIVERSAL interface logic: fits compatible ERATAC mounts and accessory positions.
✔ Distance benefit: particularly relevant for long range, mountain hunting, and steep shooting angles.
Why this product?
This product solves a small but practically relevant interface problem. It is not a primary system, but a component that makes mounting, operation, or control more reliable. It is crucial whether it is visible, accessible, and compatible in your real setup.
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Error prevention: reduces typical mounting or operating errors when used correctly.
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System integration: complements existing ERATAC/Picatinny setups instead of replacing an entire platform.
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Reproducibility: helps to repeat settings and procedures more cleanly.
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Practical benefit: useful for users who not only mount equipment but also use it in a controlled manner.
Instructor's Tip: Small parts cause big errors if used incorrectly
Before the first live use, check not only if the part fits, but also if you can actually use it when shouldering. A bubble level that is not visible, or a control element that cannot be reached with gloves, offers no real advantage.
After mounting, always check for function, freedom of movement, and secure fit. Accessories on rails and mounts can loosen with recoil, transport, or frequent handling if they were only tightened by feel.
Our Assessment
The ERATAC ACI Holder with Bubble Level D30 and D34 is useful if you want to solve precisely this interface problem and compatibility has been clarified in advance. It is less useful if you expect a small accessory part to compensate for fundamental mounting, shooting, or operating errors.
Useful for:
- Range and precision setups with repeatable mounting work
- Hunting rifles with a consciously constructed optic/accessory logic
- Workbench, mounting, zeroing, and control shots
- Users who do not want to ignore minor system errors
Less useful for:
- Users without a suitable interface
- Setups where the component is not visible or accessible when shouldering
- Users who do not perform mounting and control cleanly
- Cases where another primary system is actually needed
Direct Classification:
✔ ERATAC ACI Holder with Bubble Level D30 and D34: useful as a precise accessory for an existing setup.
✔ Improvised solution: cheaper, but often less reproducible and more prone to errors.
The product is worthwhile if it solves a real problem: alignment, display, attachment, or operation. Without a suitable interface, it is the wrong part.
Application Scenarios
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Workbench / Mounting: clean alignment, checking, and retrofitting.
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Range: control of position, function, or accessory position under real recoil.
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Hunting: useful addition if operation and visibility when shouldering are appropriate.
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Long Range: particularly relevant for angle, cant, and mounting errors.
Practical Tip: Do not derive compatibility from the name
ERATAC parts sometimes look similar but work with different interfaces. Check the SKU, height, diameter, and interface of your mount – not just the product image or headline.
For accessories on optic mounts, additionally check whether turrets, parallax wheel, illumination unit, or magnification ring remain freely operable.
Features & Construction
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ACI: Angle Cosine Indicator for estimating the angle and effective horizontal distance.
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Bubble level: visible control against canting when shouldering.
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Mounting position: must be placed so that it remains readable when shouldering.
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Practical limit: the display does not replace ballistic data or clean shooting technique.
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Variant logic: Standard version.
Technical Data
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Brand: ERATAC / Recknagel – accessories for mounting, sighting, and weapon platforms.
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Product Type: ACI/Bubble Level Holder – special component for defined interfaces.
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Variants: Standard version – selection must match the setup.
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Manufacturer/Item Numbers: Standard: T0940-0000.
Scope of Delivery
- 1x ERATAC ACI Holder with Bubble Level D30 and D34 in the selected variant
Not included:
No weapon, no optics, no main mount, no torque wrench, and no other accessories. Only include additional parts as included if they are explicitly part of the scope of delivery in the specific variant.
FAQ
Does this product fit every ERATAC mount?
No. ERATAC uses different interfaces and series. Check the item number, diameter, height, and interface of your mount.
Do I have to perform a function test after mounting?
Yes. Accessories and safety-relevant parts must be checked for secure fit, freedom of movement, and function after mounting.
Is this product equally suitable for hunting and sport?
Only if the function matches the setup. For hunting, quick operation and minimal disturbance are important, while for sport, reproducibility and precise control are often key.
Can the product compensate for mounting errors?
No. It can control or complement, but it does not replace proper basic mounting, appropriate height, or correct torque settings.
When is this product not useful?
If the interface does not fit or if you cannot utilize the benefit when shouldering. In that case, a different accessory or mount would be a better choice.
Conclusion: The ERATAC ACI Holder with Bubble Level D30 and D34 is a useful special part if the interface, function, and application truly match. It is not a panacea, but a precise component for cleanly built setups.
