When Wa enacted the law it was so vague people bought small parts kits, including pistol grips and pic mounted sights and BCGs and triggers. Dealers weren't sure if they could even replace worn parts legally. Now anything not including the lower can be replaced but no threaded barrels......I think
In Wa one can bring back any magazines or guns that are out of state as long as one owned them before the ban. We can also freely use any legally owned standard capacity mags and gats.....currently I'm sure they will change this as every other ban state has when they claim crime did not lower because standard cap mags are still out there.
No transfer of banned guns (other than one generation of family) and magazines.
One should acquire semi shotguns.
As a side note shops are selling a shit ton of cheap pumps (junk) as people who will buy a 2K DD won't spend a G on a A300