

Which is any butt stock designed to be attached to a semiautomatic firearm with the effect of increasing the rate of fire achievable with the semiautomatic firearm to that of a fully automatic firearm by using the energy from the recoil of the firearm to generate reciprocating action that facilitates repeated activation of the trigger. HOWEVER, It is not unlawful for a person to manufacture, own, buy, sell, loan, furnish, transport, assemble, or repair, or have in possession or under control, a short-barreled rifle, or any part designed or intended solely and exclusively for use in a short-barreled rifle or in converting a weapon into a short-barreled rifle, if the person is in compliance with applicable federal law.

Which is any rifle having one or more barrels less than sixteen inches in length and any weapon made from a rifle by any means of modification if such modified weapon has an overall length of less than twenty-six inches. Which is any shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun by any means of modification if such modified weapon has an overall length of less than twenty-six inches. Which is any firearm known as a machine gun, mechanical rifle, sub-machine gun, or any other mechanism or instrument not requiring that the trigger be pressed for each shot and having a reservoir clip, disc, drum, belt, or other separable mechanical device for storing, carrying, or supplying ammunition which can be loaded into the firearm, mechanism, or instrument, and fired therefrom at the rate of five or more shots per second. State law specifically prohibits possessing: It is Illegal to Possess.

But possession of firearms in Washington is not without limits.

A license is only required to carry a concealed firearm. Pistols (revolver and semi-auto), rifles, assault rifles and shotguns are all permitted without a license. Washington residents are permitted to possess a wide array of firearms.
