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A lot of what you are hearing on an AR is the spring and the buffer through the stock (remember that sound travels better through solids).
Their is a decent pop similar sounding to an air gun when shooting with the gas block off. You can easily hear it on videos of bolt guns suppressed on Youtube.
The best thing to hear what your gun sounds like is to have a buddy shoot it and you stand safely to the side or behind him while shooting. It is always quieter when your head is not touching any part of the firearm. Where you stand will also affect your perceived hearing as the gas from the ejection side will likely be louder than on the opposite side where no gas is coming out. I will often times hold the weapon at arms length to evaluate the sound and it always seems much quieter than when I am holding it with a proper cheek weld.
Typical actions that I have seen metered were between 100 and 115 decibels and it is not very likely that you will get below that with anything other than a .22.
Last edited by buffetdestroyer; 02-08-2011 at 02:20 PM.
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