BudsGunShop.com - Washington state legal

No, the AR-15 pattern rifle is specifically banned by name along with many others. Those not specifically banned are subject to a lot of restrictions that are listed in more detail here: budsgunshop.com/feeds/state_reg/washington_restrictions.pdf

Hi Patrick, the S&W web site says it is WA compliant, however if you read the WA restrictions, it looks like this is not compliant.
I would advise you to check with the FFL who would be doing the transfer, he would be more up on the laws in WA than we are.
Stay safe & have a great day!

Hi Patrick and welcome. Just enter your Zip Code (and proximity) info her and contact a local FFL Dealer for accurate info here : budsgunshop.com/ffl.php

this is a case where you really need to check with your local FFL