The legality of making SBR in WA is in limbo due to ambiguity in a recent amendment that was originally "intended" to enable SBR conversions, but did not explicitly state such. Until the law is amended. So for now, WA ATF won't approve form 1 SBR apps. However, F4 transfers are legal, since that part of the law is uncontested.

Thus, given the situation, I am looking into utilizing an out-of-state NFA dealer who I could send my rifle to, to perform the conversion & send it back to my local FFL on a form 4 transfer. I'm also posting this in other state forums to get a list of potential FFL's who might be interested in doing this. My local dealer (no proessional affiliation) would also be potentially interested in making an arrangement with said out-of-state dealer to offer this as a service to other WA SBR applicants until the state law is remedied. With 41p looming, it would be an opportunity for those of us who want to get SBR ocnversoin if/before the NFA rule changes.

I need to expedite this ASAP, as I don't expect the legislature to beat the timetable for 41p implementation.

I've never seen an actual date for 41P to take effect.
Lots of hurdles to it as state laws regards trust/LLC's vary and are a states rights issue.
ATF may think they omnipotent but the constitution and state legislatures disagree.

Contact New Frontier Armory here on the board.

Hope this helps.

Slated to start 12/1/15 according to a few NFA web sites.

New Frontier Armory can help you out and does this type of service quite a bit.