Chapter 18 U.S.C. section 921(a)(30)(A) states that the term "semiautomatic assault weapon" means "any
of the firearms, or copies or duplicates of the firearms in any caliber, known as -," followed by a list of
named firearms. Even though section 921(a)(3) defines "firearm" as used in chapter 18 to mean, in part,
"the frame or receiver of any such weapon," the use of "firearm" in section 921(a)(30)(A) has not been
interpreted to mean a frame or receiver of any of the named weapons, except when the frame or receiver
actually is incorporated in one of the named weapons.
Any other interpretation would be contrary to Congress' intent in enacting the assault weapon ban. In the
House Report to the assault weapon ban, Congress emphasized that the ban was to be interpreted narrowly.
For example, the report explained that the present bill was more tightly focused than earlier drafts which
gave ATF authority to ban any weapon which "embodies the same configuration" as the named list of guns
in section 921(a)(30)(A); instead, the present bill "contains a set of specific characteristics that must be
present in order to ban any additional semiautomatic assault weapons [beyond the listed weapons]." H.
Rep. 103-489 at 21.