Undetectable Firearms Act of 1988

Firearms Detection Act of 1988 - Amends the Federal criminal code to make it unlawful for any person to manufacture, assemble, import, sell, possess, receive, ship, or deliver any firearm which is not: (1) as detectable as the Minimum Standard Security Exemplar, after removal of grips, stocks, and magazines, by walk-through metal detectors commonly used at U.S. airports; or (2) impregnated with barium sulfate, or a similar compound, to facilitate detectability by cabinet x-ray systems. Defines the term "Minimum Security Standard Exemplar" to mean a firearm substitute used for testing that resembles a revolver, is made of stainless steel, and weighs four ounces.

States that nothing in this Act shall require the Federal Aviation Administration (FAA) to utilize the Minimum Security Standard Exemplar as an FAA detection standard.

Prohibits the Secretary of the Treasury from authorizing the importation of undetectable firearms.

Directs the Administrator of the FAA to conduct research to improve the effectiveness of airport security metal detectors and airport security x-ray systems.

Allows the Secretary, when appropriate because of changed technology, to submit proposed legislation to amend the definition of Minimum Security Standard Exemplar.

Directs the Administrator of the FAA, the Director of the Secret Service, and the Director of the Marshals Service to conduct a study to identify available equipment capable of detecting the Minimum Security Standard Exemplar while distinguishing innocuous metal objects.

Provides increased criminal penalties for using or carrying an undetectable firearm during the commission of a crime of violence or a drug trafficking crime.