Firearm sound suppressors are nothing like they are portrayed in Hollywood movies. Also, they are already heavily regulated by federal officials. Efforts to ban them are nothing more than political posturing.
Federal efforts to confiscate property without due process are a problem. Nor is it a coincidence that the targeted property includes personal firearms.
In spite of stringent gun-control measures, Brazil's homicide rates are among the worst in the world. Now there's a movement to let more Brazilians defend themselves with private gun ownership.