Aren't there severe restrictions on buying semi-autos in your state now (WA 1639) ?
As for ammo, yikes looks like 2x for most rounds, and virtually all lower tier brands like Wolf & PMC, (i.e. no Federal, Hornady, etc).
Yeah, this once free state isn't so free anymore.
I-1639 said you have to take a 'safety course' in order to buy an AR, (or any other semi-auto rifle),the exact guidance wasn't clear so gun stores have been giving a free 15 minute gun BS session and then give you a certificate.
No restrictions on buying pistols other than not able to take immediate possession of it.
I bought a Glock 43 last Christmas on a Saturday and got a call from the gun store to pick it up on Wednesday, all background checks are done by local LEOS.