I was looking at going to Washington State for some matches but with all the rules it doesn't seem like it's worth the trouble.
Not only do you have to worry about federal law but Washington State also has an assault weapons ban that prevents the importation of "assault weapons" -
- A semiautomatic rifle that has an overall length of less than 30 inches;
- A conversion kit, part, or combination of parts, from which an assault weapon can be assembled, or from which a firearm can be converted into an assault weapon if those parts are in the possession or under the control of the same person; or
- A semiautomatic, center fire rifle that has the capacity to accept a detachable magazine and has one or more of the following:
- A grip that is independent or detached from the stock that protrudes conspicuously beneath the action of the weapon. The addition of a fin attaching the grip to the stock does not exempt the grip if it otherwise resembles the grip found on a pistol;
- Thumbhole stock;
- Folding or telescoping stock;
- Forward pistol, vertical, angled, or other grip designed for use by the nonfiring hand to improve control;
- Flash suppressor, flash guard, flash eliminator, flash hider, sound suppressor, silencer, or any item designed to reduce the visual or audio signature of the firearm;
- Muzzle brake, recoil compensator, or any item designed to be affixed to the barrel to reduce recoil or muzzle rise;
- Threaded barrel designed to attach a flash suppressor, sound suppressor, muzzle break, or similar item;
- Grenade launcher or flare launcher; or
- A shroud that encircles either all or part of the barrel designed to shield the bearer’s hand from heat, except a solid forearm of a stock that covers only the bottom of the barrel.
- A semiautomatic, center fire rifle that has a fixed magazine with the capacity to accept more than 10 rounds.
https://giffords.org/lawcenter/state-laws/assault-weapons-in-washington/
Basically, if it's semi-automatic and takes detachable box magazines with any of those features it's banned. If it's got a pistol grip, adjustable stock, flash hider or even a threaded barrel? Banned. Mlok hand guard? Banned.
