Silencers or 'Suppressors' as they are known in the US are legal in 42 states. The process of acquiring one is protracted and requires fingerprints, photographs of the purchaser, a background check, a $200 federal tax, and registration. This regulation is enforced under the auspices of the National Firearm Act (1934).
The Hearing Protection Act; is a legislative push that would remove suppressors from National Firearms Act oversight so Americans could more easily acquire them for hearing protection while target shooting or hunting. The use of suppressors is legal in 42 states and certainly provide protections to the environment and the human ear. But the This means acquisition of a suppressor requires fingerprints, photographs of the purchaser, a background check, a $200 federal tax, and registration. Such regulations not only raises the price of suppressors but also increases the time it takes to purchase one.
A waiting period of 4 to 6 months is not uncommon.