IMHO about all of gun laws in US, silencer thing is strangest. Allright, you can use it as a hammer and break someones bones with big steel silencer... But, sorry I just can not see silencers otherwise as dangerous objects
It is something that was not covered as a right or liberty in the constitution, so we will tax the living hell out of you for it.
not because its dangerous, but because the BATFE needs more money to chase your guns.