I believe it's still being litigated. The city has done its best to ensure that legally doesn't equal easily. The devil is in the details.

The long arms stipulations are also quite restrictive.

I'm confident that there are still a lot more illegal guns here than legally registered.

http://mpdc.dc.gov/mpdc/frames.asp?doc=/mpdc/lib/mpdc/info/pdf/firearms_eligible_registration.pdf

http://mpdc.dc.gov/mpdc/cwp/view,a,1237,q,547431,mpdcNav_GID,1523,mpdcNav,|.asp