It seems not worth it.
I would love to have one, but, as you can guess I don't want to be in trouble.
Take it to Oregon. Put it on your gun and shoot it. Take it off your gun and go home. Simple as that. There are no forms to take a suppressor across state lines. You should be sure that they are legal in a state before you take them across the border.what do I have to do to use it in Oregon?