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Review:
Umarex SD4 Sound moderator

Universal sound moderator suitable for all air rifles up to 6,35 mm calibre. It features two adapters for attaching it to either a 1/2 UNF or a CCW M14 thread.
Product detail page

Temporarily Unavailable

$ 44.7

Customer Reviews

4.9

13× rated

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Markus Plattner

Verified customer, from balistas.at 15.06.2026

Machine translation

  • Very good sound suppression on my Diana Stormrider 27 joules, just an unfortunately quiet plop now.

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Thomas Schindler

Verified customer, from balistas.de 30.04.2026

Machine translation

I’d buy it again anytime, unbeatable price

  • Makes even a very loud rifle like the Imarex iconix very quiet
  • No downside

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Roman Tomašivsky

Verified customer, from balistas.cz 16.11.2025

Machine translation

  • High-quality product workmanship

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Petr Střeleček

Verified customer, from balistas.cz 04.11.2025

Machine translation

I was pleasantly surprised by the excellent damping, which is, however, more effective for larger calibers of 5.5 and 6.35 mm due to the 8.5 mm partitions.

  • Excellent processing.
  • Good attenuation.
  • Great price.
  • It's a pity that the partitions are made of plastic and not aluminum, even at a higher price.

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Michael Geissler

Verified customer, from balistas.at 23.10.2025

Machine translation

  • Reduced good
  • Unbeatable together with the UX ICONIX
  • Price !

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Matúš Rudolf

Verified customer, from balistas.sk 09.10.2025

Machine translation

Great workmanship at a very good price.
Dampens well, excellent to disassemble and clean.
Except the baffles could have been aluminum and not plastic.

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Tomáš Drbohlav

Verified customer, from balistas.cz 06.10.2025

Machine translation

  • Works, dampens really well, my guess : 80% of the wound after the shot disappeared but I'm not a pro just by ear I can only recommend.

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Dirk Maurer

Verified customer, from balistas.de 31.07.2025

Machine translation

  • Good efficiency
  • Lightweight, stable and elegant design

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JAROSLAV BOHUNĚK

Verified customer, from balistas.cz 02.06.2025

Machine translation

  • is quite light good and mainly dampens

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Peter

Verified customer, from balistas.sk 20.05.2025

Machine translation

It's cool, but there are definitely better things, and they also reflect the value, so they are exactly what they are worth.

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Július Bakša

Verified customer, from balistas.sk 17.05.2025

Machine translation

A quality and technically well-equipped presenter.

  • A quality and inexpensive presenter with a nice design.
  • It could also be produced in a shorter 150 mm version.

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Michal Rožnovják

Verified customer, from balistas.cz 15.05.2025

Machine translation

For a great price it not only looks good but also dampens well

  • Super price
  • Appearance
  • Efficiency

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