I don't see how a silencer can be deemed "essential." The firearm is essential. The ammunition is essential. The ability to use the firearm is essential. Anything else is less than essential.
Further, unless you were in your own home I would think that a DA in a criminal case or a defense attorney in a civil case might be able to convince a jury of a number of things that the user of a silencer would find inconvenient at best. That's their job and they are professionals. They could argue that ownership and indeed use of a silencer reveals that you're antisocial, spoiling for a fight, a would-be Rambo, etc.
Perhaps you might develop your thesis a bit...