ERATAC Block Mount Nut 20 MOA

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ERATAC Block Mount Nut 20 MOA – one-piece block mount with screw clamp / nut system and 20 MOA forward tilt

If the mount isn’t right, even a good scope becomes a factor of uncertainty.
ERATAC Block Mount Nut 20 MOA is an ERATAC mount with screwed clamping for permanently mounted optics. It connects scope and firearm as a defined interface – focusing on height, tube diameter, clamping, and point of impact.

With ERATAC, the variant matters more than the name: tube diameter, height, forward tilt, and clamping system must fit the firearm, optic, eye relief, and use. 20 MOA creates approximately 58 cm angular difference at 100 m and expands the usable elevation adjustment range at distance.

Important note for classification:
Before purchase, tube diameter, height, rail standard, forward tilt, eye relief, and clamping system must match. Check before buying: Picatinny/Weaver rail, optic tube diameter, objective diameter, bolt/charging handle clearance, desired mounting height, 20 MOA forward tilt, and whether screw clamp / nut system makes sense for your setup.

What makes this product technically special:
✔ One-piece block mount: maximizes stiffness through a continuous base and reduces mounting errors.
✔ Screw clamp / nut system: ideal for setups where the optic stays permanently on the firearm.
✔ High-strength aluminum / Mil-Spec Type III: structurally relevant for ERATAC mounts because mounting points must absorb recoil and clamping forces.
✔ UNIVERSAL interface: with matching T4/T5 series, accessories like bubble level, SWK, or adapters can be mounted close to the optic.
✔ 20 MOA forward tilt: 20 MOA creates approximately 58 cm angular difference at 100 m and expands the usable elevation adjustment range at distance.

Why this product?

This mount exists because the connection between glass and firearm must not be improvised. A scope must sit at the right height, not shift under recoil, and be mounted so that eye relief, stock contact, and firearm operation work. T5 GEN-2 describes not just a model series but a different operating logic: quick release, screwed permanent solution, ultralight, or T7 with ERA-Grip.

Clean optic position: height and tube diameter are chosen by variant; this prevents unnecessarily high or too low setups.

Defined clamping: screw clamp / nut system reduces improvisation on a safety- and precision-critical component.

Plan forward tilt usefully: 20 MOA must fit the distance and the scope’s adjustment range.

System accessories possible: depending on the series, bubble level, SWK, or adapters can be integrated directly into the ERATAC interface logic.

Instructor tip: mounting errors start before the first shot
Never mount a scope by eye alone. First set stock contact and eye relief, then determine height and position, then align reticle and tighten screws with the correct torque. For mounts with forward tilt, first check if your scope still has enough adjustment range at your planned zeroing distance.
unten hat. 20 MOA are useful for many long-range setups but can be unnecessary at short distances with some scopes. After every mounting: don’t just tighten, but zero the scope and document the point of impact. Repeatability isn’t theory – it only shows after removal, remounting, and a control shot.

Our Assessment

This one-piece block mount makes sense if you don’t want to skimp on the connection between firearm and optic. It’s especially suited for setups where point of impact, mounting height, and reproducible clamping are important: precision rifles, AR10/AR15 platforms, long-range scopes, and hunting rifles with heavier optics. It’s less useful if the variant doesn’t fit the optic exactly or if you just want a simple, cheap standard mount for occasional use.

Suitable for:

Precision and long-range setups with properly chosen cant
AR and bolt-action platforms with Picatinny/Weaver rail
Hunting rifles with high-quality scope and clear mounting height
Users who consciously select ring diameter, height, and clamping

Less suitable for:

Optics with a different tube diameter than the chosen variant
Firearms without a matching Picatinny/Weaver base
Users who don’t want to check height and eye relief
Setups where a cheaper simple mount is completely sufficient

Direct classification:
✔ ERATAC Block Mount Nut 20 MOA: strong as a permanent set-and-forget mount with screwed clamping.
✔ Quick-release lever: better if you want to regularly remove the optic or switch between setups.
The right choice depends not on brand name but on tube diameter, height, cant, and clamping system.

Use Cases

Long Range / Precision: cant and stiff mounting help to use the scope’s adjustment range effectively.

Range and Training: reproducible mounting saves troubleshooting point of impact deviations.

Hunting bolt-actions: clean height and eye relief are crucial for quick acquisition.

AR platforms: mounting height, charging handle clearance, and eye relief must work together.

Practical Tip: Check objective clearance and head position in real conditions
Don’t just check objective clearance dry. Dust caps, attachments, neoprene covers, or a heavier barrel can suddenly make the seemingly sufficient clearance tight. If the mount is chosen very high, the head position changes. This can be useful with a helmet or hearing protection but can cause a floating head on classic hunting stocks.

Features & Construction

Series: T5 GEN-2 – defines clamping logic, weight, and accessory interface.

Mount type: one-piece block mount – very stiff and positionally stable.

Clamping system: screw clamping / nut system – must fit frequency of removal, platform, and working style.

Cant: 20 MOA – more cant gives more elevation reserve but doesn’t replace a proper zero.

Variant logic: ring diameter: Ø30 mm, Ø34 mm, Ø36 mm; height (BH): BH15, BH22, BH25, BH35, BH13, BH19, BH23, BH27 and more.

Technical Data

Brand: ERATAC / Recknagel – mounts and accessories made in Germany.

Product type: one-piece block mount – scope mount for Picatinny/Weaver platforms.

Clamping system: screw clamping / nut system – determines whether quick change or permanent screwing is prioritized.

Cant: 20 MOA – 20 MOA creates about 58 cm angular difference at 100 m and extends the usable elevation adjustment range at distance.

Ring diameter: Ø30 mm, Ø34 mm, Ø36 mm – determines the suitable version, not just the optic.

Height (BH): BH15, BH22, BH25, BH35, BH13, BH19, BH23, BH27, BH33, BH21, BH31 – determines the suitable version, not just the optic.

Manufacturer / article numbers: Ø30 mm / BH15: T5013-2015; Ø30 m
m / BH22: T5013-2022; Ø30 mm / BH25: T5013-2025; Ø30 mm / BH35: T5013-2035; Ø34 mm / BH13: T5014-2013; Ø34 mm / BH19: T5014-2019; Ø34 mm / BH23: T5014-2023; Ø34 mm / BH27: T5014-2027; more variants via selection.

Contents of delivery

1x ERATAC block mount nut 20 MOA in chosen variant

Not included:
No scope, no Picatinny rail, no torque wrench, no spirit level, no ZFIX and no additional accessories. Accessories for universal or T7 interfaces are only listed as included if they are explicitly part of the delivery in the specific variant.

FAQ

Does this ERATAC mount fit every firearm?
No. It requires a suitable Picatinny or Weaver base and must mechanically fit the system, ejection port, bolt handle, eye relief and objective diameter.

Which mounting height should I choose?
The mounting height must fit the stock, optic, objective diameter and cheek weld. Too low can cause contact with barrel or rail, too high often worsens head position.

What does the cant mean in practice?
20 MOA creates approximately 58 cm angular difference at 100 m and extends the usable elevation adjustment range at distance. Important: cant provides adjustment reserve but does not replace proper zeroing and correct ballistic data.

Do I need to re-zero after mounting?
Yes. After every mounting or change to the optic attachment, point of impact must be checked and the firearm re-zeroed or confirmed.

When is this mount not useful?
When barrel diameter, mounting height, cant or clamping system do not fit your setup. A strong mount is only strong if the variant is correctly chosen.

Conclusion: ERATAC block mount nut 20 MOA is a technically clean solution for users who consciously select mounting height, barrel diameter, cant and clamping. It’s worth it when point of impact and system logic are more important than the lowest price. It’s not useful if the variant only roughly fits.