Section 921(a) of title 18, United States Code, is amended—
(1)
in paragraph (3), by striking “or (D) any destructive device” and inserting “; (D) any destructive device; or (E) any combination of parts designed or intended for use in converting any device into a firearm and from which a firearm may be readily assembled”; and
(2)
in paragraph (4)—
(A)
by adding “and” at the end of subparagraph (A);
(B)
by striking “and” at the end of subparagraph (B) and inserting a period; and
(C)
by striking subparagraph (C).