This is kind of interesting. It shows by state whether or not MGs, suppressors, SBRs, and SBSs are allowed and the caveats if any.
It seems to be up to date; until recently Washington state was NO for SBRs and the list shows them correctly (AFAIK) as YES.
https://www.reddit.com/r/NFA/comments/937o50/nfa_items_permitted_by_state/
It seems to be up to date; until recently Washington state was NO for SBRs and the list shows them correctly (AFAIK) as YES.
https://www.reddit.com/r/NFA/comments/937o50/nfa_items_permitted_by_state/