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I know this is an old post, but here are the answers. I went to the range Saturday with a friend who had one on his AR-15. It actually came with a letter from BATFE stating it as legal. It's amazingly easy to use. It took us both about 15 rounds to figure it out. It really will unload an...

I'm just a college student, but I work with my father during the summers assisting with industrial audiology. 85 dB is for a sustained 8 hour work day. It would depend on how many rounds you fire at 115 dB AND how much more noise you would encounter in that same 8 hour period (mowing the grass...