‘‘(b)(1)  A State or a political subdivision of a State may not impose any regulation, prohibition, or registration or licensing requirement with respect to the design, manufacture, importation, sale, transfer, possession, or marking of a rifle or shotgun that has moved in, or any such conduct that affects,  interstate or foreign commerce, that is more restrictive, or impose any penalty, tax, fee, or charge with respect to such a rifle or shotgun or such conduct, in an amount greater, than is provided under Federal law. 
To the extent that a law of a State or political subdivision of a State, whether enacted before, on, or after the date of the enactment of this subsection, violates the preceding sentence, the law shall have no force or effect.  For purposes of this subsection, the term ‘rifle or  shotgun’  includes any part of a rifle or shotgun, any detachable magazine or ammunition feeding device, and any type of pistol grip or stock design. 
(also awards attorney's fees)