While in the US it’s much harder to get a silencer as they fall into a category similar to automatic weapons.
And the US laws are very strict for things like tanks and such since they fall under the NFA which again, lumps all these things into a similar category as automatic weapons and even if you’re a cop they’ll put you in prison for violating those laws.
https://www.justice.gov/usao-md/pr/former-taneytown-police-c...