Question: When buying a stripped lower from a dealer (in Washington State), is one required to "declare" the purpose of the lower? ... Meaning is one required to state the intention to build a rifle or pistol. As I understand it the ATF 4473 is required, and the item is listed as "other". Then if one mentions it is intended for a pistol build the WA (gun registration form) is filled out. However if the intent is unclear, and later a pistol is built, is there an issue, since the WA form wasn't done? I'm also in being educated on changing configuration from pistol to rifle, or in reverse. Primarily, though, it's the dealer paperwork the has me frustrated.