And, just to add to the confusion...........................................

RCW 9.41.240
Possession of pistol by person from eighteen to twenty-one.
Unless an exception under RCW 9.41.042, 9.41.050, or 9.41.060 applies, a person at least eighteen years of age, but less than twenty-one years of age, may possess a pistol only:
(1) In the person's place of abode;
(2) At the person's fixed place of business; or
(3) On real property under his or her control.