; and (C) by striking or (k) and inserting (k), (r), (v), or (w) ; (2) in paragraph (2)(C), by inserting or large capacity ammunition feeding devices after firearms or quantities of ammunition ; and (3) in paragraph (3)(E), by inserting 922(r), 922(v), 922(w), after 922(n), . (e) Penalties Section 924(a)(1)(B) of title 18, United States Code, is amended by striking or (q) of section 922 and inserting (q), (r), (v), (w), or (aa) of section 922 . 5. Background checks for transfers of grandfathered semiautomatic assault weapons (a) In general Section 922 of title 18, United States Code, as amended by the preceding provisions of this Act, is amended— (1) by repealing subsection (s); (2) by redesignating subsection (t) as subsection (s); (3) in subsection (s), as redesignated— (A) in paragraph (3)(C)(ii), by striking (as defined in subsection (s)(8)) ; and (B) by adding at the end the following: (7) In this subsection, the term chief law enforcement officer means the chief of police, the sheriff, or an equivalent officer or the designee of any such individual.