To amend section 274 of the Immigration and Nationality Act to impose mandatory minimum sentences, and increase certain sentences, for bringing in and harboring certain aliens and to amend title 18, United States Code, to provide enhanced penalties for persons committing such offenses while armed.

Amends the Immigration and Nationality Act with respect to sentences for bringing in and harboring certain aliens to: (1) establish minimum prison terms; (2) increase the maximum sentence in instances of serious bodily injury; and (3) establish minimum prison terms for repeat violations.

Amends Federal criminal law to subject persons bringing in and harboring aliens while armed to such revised penalties (in addition to penalties provided under criminal law).