Silencers are illegal in SOME states for the general public, but only a few. See link below
Gun silencers work by trapping and slowing down the escaping gases from a gunshot, which reduces the noise produced. The silencer contains baffles that allow the gases to expand and cool before exiting the device, muffling the sound of the shot.
No. They trap and slow the release of gasses after the gun fires.
Silencers are not legal in the state of Iowa. Currently there are 39 out of 50 states that individuals, trusts and corporations can legally own silencers.
No
Typically steel or aluminum
Suppressors are legal, yes.
According to what I found (a cursory search on the internet) silencers are legal in Kansas as of sometime in 2007 or 2008. Silencers are still regulated by federal law. To purchase one legally, you must go through a class 3 dealer.
Yes. Must be registered with the Federal BATF, but state legal.
No. California does not honor any "gun permits" from Nevada. I assume you are referring to the Nevada CCW (Concealed Carry of a Weapon) permit as Nevada does not have any actual "gun permits".
Basically any gun can have a silencer. Silencers don't work as well on revolvers, but any gun can be threaded for one.
there was yo-yos dolls jumpropes gun silencers and the vaccum cleaner