Declares that, except as otherwise provided in this act, a person is guilty of reckless endangerment if the person stores or leaves a loaded firearm in a location where the person knows, or reasonably should know, that a child is likely to gain access, and a child obtains possession of the loaded firearm.

Does not apply if: (1) The firearm is secured in a locked box, gun safe, other secure locked storage space, or secured with a lock or any device that prevents the firearm from discharging;

(2) The child's access to the firearm is supervised by an adult;

(3) The child's access to the firearm was obtained as a result of an unlawful entry; or

(4) The child's access to the firearm was in accordance with RCW 9.41.042.

Provides that, when selling any firearm, every dealer shall offer to sell or give the purchaser a locked box, gun safe, a lock, or any device that prevents the firearm from discharging.

Requires that, every store, shop, or sales outlet where firearms are sold, that is registered as a dealer in firearms with the department of licensing, shall conspicuously post, in a prominent location so that all patrons may take notice, the following warning sign, to be provided by the department of licensing, in block letters at least one inch in height:

Provides that every person who violates this act is guilty of a class 3 civil infraction under chapter 7.80 RCW, and may be fined up to fifty dollars.