Source: http://www.seattletimes.com/seattle-news/politics/state-ag-proposes-assault-weapons-ban/
Source: http://atg.wa.gov/news/news-releases/ag-ferguson-proposes-ban-assault-weapons-high-capacity-magazines

It appears that Washington State Attorney General Bob Ferguson is attempting to make a name for himself in the Democratic Party by announcing an "assault weapon" ban and ban on "high capacity" magazines.
The proposed legislation will be proposed next year.

It is hard to say what form it will take since it will be modeled after other states "successful" [sic] bans and focus on new sales. Supposedly, existing firearms will be grand-fathered and there will be no provision for "registration." hmm...we have heard that before. 

I guess we will have to wait and how they even define an "assault weapon" and if it is any closer to reality than the recent MA AG's interpretation: "I will know it, when I see it" ban.