RCW 9.41.240
Possession of pistol or semiautomatic assault rifle by person from eighteen to twenty-one. (Effective January 1, 2019.)
(1) A person under twenty-one years of age may not purchase a pistol or semiautomatic assault rifle, and except as otherwise provided in this chapter, no person may sell or transfer a semiautomatic assault rifle to a person under twenty-one years of age.
(2) 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:
(a) In the person's place of abode;
(b) At the person's fixed place of business; or
(c) On real property under his or her control.
(3) Except in the places and situations identified in RCW 9.41.042 (1) through (9) and
9.41.060 (1) through (10), a person at least eighteen years of age, but less than twenty-one years of age, may possess a semiautomatic assault rifle only:
(a) In the person's place of abode;
(b) At the person's fixed place of business;
(c) On real property under his or her control; or
(d) For the specific purpose of (i) moving to a new place of abode; (ii) traveling between the person's place of abode and real property under his or her control; or (iii) selling or transferring the firearm in accordance with the requirements of this chapter; provided that in all of these situations the semiautomatic assault rifle is unloaded and either in secure gun storage or secured with a trigger lock or similar device that is designed to prevent the unauthorized use or discharge of the firearm.
RCW 9.41.060
Exceptions to restrictions on carrying firearms.
*** CHANGE IN 2019 *** (SEE 1589.SL) ***
The provisions of RCW 9.41.050 shall not apply to:
(1) Marshals, sheriffs, prison or jail wardens or their deputies, correctional personnel and community corrections officers as long as they are employed as such who have completed government-sponsored law enforcement firearms training and have been subject to a check through the national instant criminal background check system or an equivalent background check within the past five years, or other law enforcement officers of this state or another state. Correctional personnel and community corrections officers seeking the waiver provided for by this section are required to pay for any background check that is needed in order to exercise the waiver;
(2) Members of the armed forces of the United States or of the national guard or organized reserves, when on duty;
(3) Officers or employees of the United States duly authorized to carry a concealed pistol;
(4) Any person engaged in the business of manufacturing, repairing, or dealing in firearms, or the agent or representative of the person, if possessing, using, or carrying a pistol in the usual or ordinary course of the business;
(5) Regularly enrolled members of any organization duly authorized to purchase or receive pistols from the United States or from this state;
(6) Regularly enrolled members of clubs organized for the purpose of target shooting, when those members are at or are going to or from their places of target practice;
(7) Regularly enrolled members of clubs organized for the purpose of modern and antique firearm collecting, when those members are at or are going to or from their collector's gun shows and exhibits;
(
Any person engaging in a lawful outdoor recreational activity such as hunting, fishing, camping, hiking, or horseback riding, only if, considering all of the attendant circumstances, including but not limited to whether the person has a valid hunting or fishing license, it is reasonable to conclude that the person is participating in lawful outdoor activities or is traveling to or from a legitimate outdoor recreation area;(9) Any person while carrying a pistol unloaded and in a closed opaque case or secure wrapper; or
(10) Law enforcement officers retired for service or physical disabilities, except for those law enforcement officers retired because of mental or stress-related disabilities. This subsection applies only to a retired officer who has: (a) Obtained documentation from a law enforcement agency within Washington state from which he or she retired that is signed by the agency's chief law enforcement officer and that states that the retired officer was retired for service or physical disability; and (b) not been convicted or found not guilty by reason of insanity of a crime making him or her ineligible for a concealed pistol license.
It is my understanding that people 18 to less than 21 years of age can open carry a handgun under these certain conditions.
