Suppressor sound tests / 9mm / 9mm (HK MP5K/SP5K)

9mm (HK MP5K/SP5K)2023

8 suppressors were fired on this same gun, on the same day, with the same ammunition. It was never fired without a suppressor, so how much quieter each one made it cannot be worked out. The figures below are the level measured with the suppressor fitted.

The bar above the list places each of the 8 suppressors fired on this gun by how loud the shot still measured at the shooter's ear. Between the quietest and the loudest there is 2 dB. It stays on screen as you read, so hovering a row shows where that suppressor falls.

The shaded band is the tightest 2.76 dB stretch of this strip, holding 8 of the 8 suppressors tested, which this test cannot tell apart from one another. It is a sample rather than a special group, so sweep the strip and the band follows. That is most of the field, so on this gun sound is not what separates these suppressors. What decides it is whatever else matters to you, like weight, length or price.

Hover a row or drag the bar
quieter 137 dB139 dB louder
Sort by
SuppressorAt the ear
  1. Resilient RS9137.1 dB
    13.88 oz · 7.01"See this suppressor →
  2. TBAC Fly 9 Long137.1 dB
    8.53 oz · 6.78"See this suppressor →
  3. SilencerCo Omega 9K137.6 dB
    8.51 oz · 5"See this suppressor →
  4. YHM R9 Phantom137.9 dB
    16.03 oz · 6.515"
  5. TBAC Magnus 375137.9 dB
    18.4 oz · 9.5"
  6. Rugged Obsidian 9 Full138.2 dB
    13.33 oz · 7.83"See this suppressor →
  7. YHM R9138.7 dB
    10.78 oz · 5.477"See this suppressor →
  8. Dead Air Mojave 9 Full Keymo138.7 dB
    10.01 oz · 7.7"See this suppressor →

Products come and go from these events voluntarily. A suppressor missing from this list was not tested, nothing more. Differences smaller than 2.76 dB are closer than this test can reliably measure. The results also don’t record which mount or muzzle device each suppressor was fitted with, and that hardware can affect both the reading and the weight and length shown above. Decibels are not a count of anything: as a rule of thumb every 10 dB is roughly a halving of how loud something seems, so the gaps here are larger than they look.

Every row opens to show all three microphones, and it is worth opening. A suppressor can be the quietest here beside the muzzle and middling at the shooter’s ear, so a claim about one says nothing about the other.

Thunder Beast published the decibel figures, the weights and the lengths. The resolution limit of 2.76 dB, the shaded band are worked out here from those measurements.

Data from the 2023 SILENCER SUMMIT, published by Thunder Beast Arms Corp. See their results