http://mpdc.dc.gov/mpdc/lib/mpdc/info/pdf/registering_firearm_dc.pdfFound it on DU.
How Do I Register a Firearm in the District?
To register a fiream, residents must report to the
Firearms Registration Section of the Metropolitan Police
Department, located at 300 Indiana Avenue, NW.
The application process may take up to 14 days.
The cost for registering each firearm is $13, plus $35 to process fingerprints.
Applicants must:
Be 21 years of age
Complete a firearms application
Bring proof of residency (e.g., D.C. Drivers License)
Bring two (2) passport-sized front facing photos
Be fingerprinted
Pass a 20-question multiple choice test
Complete a notarized firearms eligibility statement
Important Things to Remember
When transporting your firearm, it must be unloaded,
wrapped securely or placed in a gun case on the back
seat of your car.
If you are stopped by the police, you must immediately
tell the officer that you are en route to the Firearms
Registration Section to register the firearm.
The gun dealer will not give you the firearm until
you return with the Firearms Application stamped
APPROVED by the Metropolitan Police Department,
Firearms Registration Section.
If you have possession
of the firearm(s), you must IMMEDIATELY bring it
to the Firearms Registration Section, located at 300
Indiana Avenue, NW.
ONLY rifles, shotguns and revolvers may be
registered in the District of Columbia. The following
firearms may not be registered in the District: sawed-off
shotguns, short-barreled rifles, machine guns and semiautomatc
handguns.