Section 1 Prohibition against possession or transfer of junk guns, also known as saturday night specials
“(aa)
“(1) It shall be unlawful for any person to possess or transfer a junk gun which has been shipped or transported in interstate or foreign commerce.
“(2) Paragraph (1) shall not apply to the continuous and otherwise lawful possession of a junk gun by a person during any period that began before the effective date of this subsection.”
“(36)
“(A) The term junk gun means—
“(i) a handgun that is not a sporting handgun; and
“(ii) any combination of parts from which a handgun described in clause (i) can be assembled.
“(B) The term sporting handgun means a handgun which the Secretary has determined, using the criteria applied in making determinations under section 925(d)(3), to be of a type generally recognized as particularly suitable for or readily adaptable to sporting purposes.”