; and (B) the number of arrests for violations of this section. . (b) Penalties Section 924(a) of such title is amended— (1) in paragraph (2), by inserting or section 923A(c) after 922 ; and (2) in paragraph (5), by adding at the end the following: For purposes of this paragraph, the issuance of a serial number and identifying mark for a firearm in violation of section 923A shall be considered a transfer of the firearm in violation of section 922(t). . (c) Clerical amendment The table of sections for chapter 44 of such title is amended by inserting after the item relating to section 923 the following: 923A. Serial number requirement for homemade firearms. . 5. Definitions (a) Terms For purposes of this Act— (1) the term ammunition feeding device means a magazine, belt, drum, feed strip, or similar device, but does not include an attached tubular device designed to accept, and capable of operating only with, .22 caliber rimfire ammunition, and an ammunition feeding device shall be considered detachable if the device can be removed from a firearm without disassembly of the firearm action; (2) the term assault weapon parts kit means any part or combination of parts designed and intended to enable a consumer who possesses all such necessary parts to assemble a semiautomatic assault weapon; (3) the term machinegun parts kit means any part or combination of parts designed and intended to enable a consumer who possesses all such necessary parts to assemble a machinegun or convert a firearm into a machinegun; (4) the term semiautomatic assault weapon means— (A) a semiautomatic rifle or semiautomatic shotgun that has the capacity to accept a detachable ammunition feeding device; or (B) a semiautomatic pistol that has— (i) the capacity to accept a detachable ammunition feeding device; and (ii) any one of the features described in subsection (b); (5) the term machinegun has the meaning given such term in section 5845(b) of the Internal Revenue Code of 1986