Gun Parts Trafficking Act of 2001

Gun Parts Trafficking Act of 2001 - Amends the Federal criminal code to: (1) include within a prohibition against the shipment or transportation of firearms any parts or combinations thereof that when assembled on a frame or receiver would constitute a firearm; (2) make it unlawful for any person other than a licensed manufacturer to manufacture or assemble a firearm; and (3) increase from $50 to $500 the fee for a license to manufacture firearms.

Amends the National Firearms Act to revise generally the prohibition against the possession or transfer of certain combinations of machine gun replacement parts.