A great compact and light weight rimfire suppressor. Made from 7075 and 2024 aluminum and coming in at only 2.3 ounces and only 4.5 inches long, the Whisper 4 is great at keeping everything compact and quiet.
We used the Larson Davis LXT1-QPR to gather tons of data.
We used a Ruger 10/22 with a 16" match barrel and used Aguila 40 grain subsonic and Remington 22 thunderbolt for our testing.
Aguila subsonic 122 dB
Remington Thunderbolt 126 dB
Just closing the 10/22 action was 111.9