There are several type of Title II firearms (those sold by Class 3 SOT FFLs) that are restricted by the National Firearms Act.
Each state can impose additional restrictions on the sale, purchase, and transfer of Title II or NFA firearms. These laws or restrictions are in addition to the compliance that is required with the National Firearms Act.
In Washington you can own the following items that are regulated the National Firearms Act:
- Any Other Weapon (AOW)
- Destructive Devices (DD)
- Short Barreled Rifles (SBR) legal to purchase and possess, but not manufacture.
In Washington you cannot own the following NFA restricted items.
- Machine Guns*
- Short Barreled Shotguns (SBS)*
- It is not permitted to manufacture an SBR within the state of WA
NOTE:* Not legal to own or possess parts that can make these firearms unless these items were legally acquired prior to July 1, 1994 and be in compliance with federal law or machine Gun or Short Barreled Shotgun, but be possessed by by peace officer for official duty, armed forces, or person in compliance with NFA who has undergone Fingerprint and background check who in engaged in the production , manufacture, repair, or testing of Machine guns, or SBS
Follow this link to find out more about Washington and NFA restrictions on Class 3 Firearms
If you want to build an SBR to possess in the state of Washington, a co-trustee in another state can apply for the Form 1 to build an SBR and then after it is built and engraved, it is legal to transfer to WA state using a Form 20 and would be legal to possess in the State of Washington.