ERATAC Folding Front Sight 1.35 mm / Front Sight – Foldable Front Sight for Picatinny Backup Sights
A mechanical backup sight is only useful if the front sight width, height, and rear sight match the setup.
The ERATAC Folding Front Sight 1.35 mm / Front Sight is the front folding sight for an ERATAC/Picatinny backup sight with a 1.35 mm front sight width.
It is not a complete sight set. You will need a suitable rear folding sight and an appropriate Picatinny rail. The standard version is the classic front sight variant without HK-style protective geometry.
Important note for classification:
This product is only the Front Sight / Folding Front Sight. Without a suitable rear sight, you will not have a complete mechanical sighting system. Before purchasing, check: Picatinny rail, sight line height, front sight width, standard or HK-style, existing folding sight, co-witness planning, optic height, and intended use.
What makes this product technically special:
✔ 1.35 mm front sight width: narrower, finer, and suitable for more precise aiming at slightly longer distances, but less quickly visible than 1.8 mm
✔ Foldable design: lies flat against the system when not in use and does not permanently obstruct the field of view.
✔ AR15-like sight line logic: useful if backup sights need to match common AR heights.
✔ Tool-free elevation adjustment of the front sight: simplifies zeroing of the mechanical sight.
✔ Picatinny base: clean mounting on compatible MIL-STD-1913 rails.
Why this product?
Electronic optics are fast, but a mechanical reserve can be useful on training, duty, or competition firearms. It is crucial that the backup sight is not only mounted but also properly set up.
This folding front sight is the front part of the system. The 1.35 mm front sight width influences how finely or quickly the front sight works in the sight picture. The standard version is the classic front sight variant without HK-style protective geometry.
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Mechanical reserve: helps when a red dot, battery, or glass no longer provides a usable aiming reference.
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Flat storage: when folded, the sight remains unobtrusive and interferes less with primary optics.
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Consciously choose front sight width: a wider front sight is quicker to pick up, a narrower one can aim more precisely.
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Clean front sight base: instead of improvised individual parts, a reproducible BUIS setup is created.
Instructor Tip: Really zero your backup sights
Backup sights are often mounted and never zeroed. Then they are just decoration. After mounting, always zero with the ammunition you actually use.
Check the sight line with your main optic. With very low or very tall optic setups, even a flat folding front sight can interfere in the wrong place.
Consciously flip the sight up and down during training. Otherwise, under stress, you won't notice if it moves freely or hits the optic, light, cable, or cover.
Our assessment
The ERATAC Folding Front Sight 1.35 mm / Front Sight is useful if you want to cleanly set up a mechanical backup sight on a Picatinny base. It is not a replacement for a primary optic, but a reserve and training option.
The limit is clear: purchased alone, a front sight does not provide a complete sighting system. You need a suitable rear sight, an appropriate mounting position, and a properly zeroed sight line.
Suitable for:
- AR and Picatinny platforms with a backup sight concept
- Range and training firearms with red dots or LPVOs
- Users who consciously train with mechanical backup sights
- Setups where a flat, foldable front sight is needed
Less suitable for:
- Firearms without a Picatinny rail
- Users expecting a complete BUIS set
- Setups without a suitable rear sight
- Configurations where the primary optic blocks the sight line
Direct classification:
✔ 1.35 mm folding front sight: conscious choice of front sight width for sight picture, speed, and precision.
✔ Complete BUIS set: easier if you want to buy matching front and rear sights directly.
✔ Red dot alone: faster and simpler in normal operation, but without mechanical reserve.
This folding front sight is worthwhile if you specifically need the front component for an existing or planned ERATAC backup sight setup.
Application scenarios
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Backup sighting: mechanical reserve behind or next to an electronic primary optic.
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Shooting sports / Range: training with open sights and redundancy to the optic.
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Duty/Law enforcement-related setups: mechanical reserve on Picatinny weapon platforms.
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Technical setup control: checking sight height, co-witness, and mechanical aiming reference.
Practical Tip: Choose front sight width according to distance
A narrower front sight covers less of the target but can be acquired slower. A wider front sight is faster to pick up but obscures more of the target at a distance.
Choose the front sight width not by optics, but by actual use: close range and fast target acquisition or finer aiming at slightly longer distances.
Features & Construction
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Folding Front Sight: front mechanical sight component; not fully usable without a rear sight.
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Front Sight Width: 1.35 mm – affects target coverage and visibility.
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Folding Mechanism: reduces overall height when not in use and protects the sight line in everyday use.
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Height Adjustment: the front sight is infinitely adjustable in height without tools, which simplifies zeroing.
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Standard/HK-Style: Standard – important for the sight picture, design, and optical classification of your setup.
Technical Data
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Brand: ERATAC / Recknagel – mechanical backup sight for Picatinny systems.
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Order number: T0543-0355 – unique identification of this version.
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Product type: foldable front sight / folding front sight – front part of a mechanical sighting system.
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Front Sight Width: 1.35 mm – narrower, finer, and suitable for more precise aiming at slightly longer distances, but less quickly visible than 1.8 mm
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Mounting Base: Picatinny – requires a suitable rail.
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Design: Standard – execution of the front sight geometry.
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Adjustment: front sight height infinitely adjustable without tools – important for zeroing.
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Overall Height: ERATAC system with a very flat folded design; still check compatibility with the primary optic.
Scope of delivery
- 1x ERATAC Folding Front Sight 1.35 mm / Front Sight
Not included:
No rear folding sight, no complete backup sight set, no optic, no weapon, and no Picatinny rail. For a complete mechanical sighting system, you need a suitable rear sight.
FAQ
Is this a complete backup sight set?
No. This is only the front folding sight. For a complete mechanical sighting system, you also need a suitable rear folding sight.
What does the front sight width mean in practice?
1.35 mm describes the visible width of the front sight. Narrower, finer, and suitable for more precise aiming at slightly longer distances, but less quickly visible than 1.8 mm.
Does the folding front sight fit every weapon?
No. It requires a suitable Picatinny rail and a sensible position in relation to the rear sight and the primary optic.
Does the mechanical sight need to be zeroed?
Yes. After mounting, the sight must be zeroed with your weapon and ammunition. Just mounting it is not enough.
When is this folding front sight not useful?
If you don't have a suitable rear sight, don't own a Picatinny rail, or work exclusively with optics without a backup concept.
Conclusion: The ERATAC Folding Front Sight 1.35 mm / Front Sight is a clean front sight component for Picatinny backup sights. It is worthwhile if you consciously choose the front sight width and design and truly zero the mechanical sight. As a single part without a rear sight, it is not a complete solution.
