This is my opinion (because I have never tested this), but if you have the same length barrel, same suppressor, same cartridge, and all are single shot they should sound the same. You will have differences. Exposed hammers will produce more noise than an Etronics 700. Your AR may have a gas block that leeks a little. I think within reason a 16 inch barrel with a cyclone on it will sound the same regardless of how the breach is sealed. I would love to see someone with a turn bolt and an AR test this. Any one have both and a $5,000 calibrated DB meter?
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