When legislators violate the Bill of Rights, they do more harm than you might think.

I believe that suppressor laws are far too restrictive, and need to be repealed. Suppressors and their components are not weapons, but unfortunately they are treated as such by the BATFE and by federal and state laws. The United States is the only country that I am aware of that restricts the importation, manufacture, possession, and use of suppressors. In Finland, the government encourages the use of suppressors on firearms because they reduce hearing loss and reduce noise pollution. Suppressors also have the added benefit of reducing the amount of lead that is emitted into the air and of reducing recoil. Even England doesn't restrict the possession of suppressors, because they are not weapons. Laws, like the NFA laws that restrict the manufacture and possession of suppressors only prevent law abiding citizens from using them. Criminals who by definition do not obey the law can easily improvise an inexpensive disposable suppressor without having to go through the paperwork or pay the $200 tax that is imposed any time a suppressor is transferred or manufactured by someone who is not a licensed manufacturer. Some firearms, (like my hunting rifle in 7mm Remington Magnum), will cause hearing damage even if the user is wearing hearing protection like ear plugs or ear muffs, but by placing a suppressor on the end of the rifle, the noise would be reduced to a level where ear plugs would be more effective. The noise of the gun shot would still be fairly loud, but it would be much less likely to cause hearing damage. These restrictions on suppressors not only make it extremely expensive and difficult to reduce the amount of noise emitted by firearms, but they limit innovation that could be transferred to other types of noise reduction devices. Here are some links I would suggest clicking on:
http://www.fortliberty.org/military-library/firearm-gun-silencers-suppressors.shtml
http://guns.connect.fi/rs/suppress.html http://guns.connect.fi/gow/silencer.html
http://www.atf.treas.gov/pub/fire-explo_pub/gca.htm
http://guns.connect.fi/rs/summary.html
http://guns.connect.fi/rs/dirdiagr.html http://guns.connect.fi/rs/measure.html
http://guns.connect.fi/rs/Reflex.html