guys i disagree and say it is Illegal in washington state from WA rules and regs page ix. NO AR, AK, other frames or receivers that when completed would constitute an “Assault
Weapon” as defined above. above says "AR15, M16, or M4 in all
forms" budsgunshop.com/feeds/state_reg/washington_restrictions.pdf

After further review, I would have to agree with Randy, I missed that part in the regs. Good catch Randy.

Hi Christopher and welcome. It will ship no issue to WA. Cheers and stay safe!

Hi Christopher, yes sir, this is legal to ship to WA state. It will be shipped to FFL of your choice for transfer.
Stay safe & have a great day!