But I think the State Of California knows... And they're the ones to worry about. EDIT: I'm not sure about this. I really don't know if the lowers are registered. I do know that my primary LGS won't handle lowers. Lowers are serial numbered so I'm guessing that they are registered somewhere. Another LGS I visited had 3 lowers for sale so they must be ok to sell in California. But I'm not clear about registration... Richard Wanna kill these ads? We can help!