https://youtu.be/M3a3uiCJbdA
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Thanks for posting that along wit the numbers. Noticed in 16" 5.56, your numbers were a bit higher than Silencer Shop's (good to have multiple data points).
What are your thoughts on this can compared with a Dead Air Sandman S?
The Razor compares directly to the Sandman-S, pick the mounting system you prefer.
In regards to db measurements, some days are better than others as the weather plays a large role in sound pressure. We use a recently calibrated meter that is qualified to measure gunshots.