Hammerli Pneuma Elite more quiet shroud DIY
I made the quiet shroud for Pneuma Elite, copying from Sparrow22 (27x129mm with sound reduction: 41dB by Mfr). The tested sound noise was 72-73dB.



http://www.silencerco.com/?section=Products&page=Sparrow
More info:
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=77913&start=25
Note: This is my sound reduction study purpose.
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I think Sparrow’s internal design will be the most effective and easy to modify.