Airsoft gun laws in Washington are fairly generic, meaning the state upholds the federal laws in regards to arisoft use. Airsoft gun laws in Washington state require all purchasers and users of arisoft guns to be at least 18 years of age.
If you are under the age of 18 in Washington state you must be accompanied by a legal guardian or individual over the age of 21 years old to legally purchase an airsoft gun. This aisroft gun law applies to all airsoft guns in the state of Washington as well as all pellets (ammuniton) and airsoft supplies.
In addition to the buying age, Washington state airsoft gun law requires that all airsoft guns must possess an orange tip, to prevent the appearance or confusion of a real firearm. In accordance with these 'appearance laws,' it is also illegal to brandish or show an airsoft gun in a public place in Washington state.
It is only legal to play airsoft or fire the gun in designated areas; the toy weapons are not permitted in public areas such as parks, schools, etc. In general, the laws assocaited with airsoft in Wsshington state revolve around common sense use, and appearance issues.