A silencer, in and of itself, is an NFA item regardless of what someone uses it for. Even if all you do is use it for a doorstop it's still an NFA item. Given that is what the law actually says, there's no need to twist or argue anything.
Okay after reviewing some actual prosecutions for airgun silencers, and in light of airguns still being sold across the nation with built in silencers I find myself confused.
Further looking at the federal legal definition of a silencer as something that MAY be used reduce the report of a firearm I cannot see anything as being legal.
Yet pillows are legal. People have been prosecuted for trying to use a potato to silence a report, but potatos are legal. Soda bottles, and other items similarly prosecuted.
Yet mere possession of the airgun accessory can be prosecuted as illegal absent intent to reduce the report of a firearm.
So in some cases mere intent makes anything a silencer even things most people own, and in others no intent does as well because it MAY be used to reduce the rpot of a firearm.
So there is many airguns on the market with silencers. Some with integral suppressors.
Yet some argue that even those are the legal definition of silencers because someone could still use them on a firearm by destroying the airgun. Hacksaw off the barrel and it could be use to reduce the report of a firearm. Meaning it could still be considered a silencer, because it could reduce the report of a firearm.
So could my pillow though.
So anything has be prosecuted as a silencer based on intent. Silencer is defined as something that may be used on a firearm to reduce the report.
Airgun silencers are not firearm silencers, but may be used to reduce the report on a firearm, making them NFA silencers. So can a bottle, a pillow, a towel...
Even a barrel shroud could be prosecuted as a silencer because it would reduce the muzzle report by 1 decibel, just like a longer barrel would.
I guess everything is a silencer if the right people say it is.
Illegal shoestring machineguns the shoestring itself considered a machinegun, illegal potato silencers, the potato becoming an illegal NFA item.
The entire population has homes filled with illegal fruit and vegetable silencers!
Illegal fabric silencers (pillows, blankets, towels, clothing.) Illegal...
Anything your overlords discretionarily define as illegal becomes at that moment actualy illegal. In fact since the law has no intent, anything that is declared a silencer and is shown to reduce the report for at least one shot, is a silencer. Pillow, potato, airgun accessory, paintball accessory, it does not matter.
With odd items they have shown intent, but the law never shows that requirement.
Which further means if it is not an item that the jury feels is normal, they would likely agree how the law is written that it meets the definition.
So a barrel shroud, or those fake silencers that are simply tubes without a doubt could be prosecuted as a silencer.
I used the term "silencer" because it is the actual term used in law, and the actual name given to the item by the inventor himself when he invented the automobile muffler and the firearm silencer.