Sean, no Sir. The magazine configuration (outside of the grip) is prohibited. Details under Handguns here : budsgunshop.com/catalog/feeds/state_reg/washington_dc_restrictions.pdf

sorry it not legal in DC The following are prohibited: Washington D.C. specifically lists handguns which are eligible for registration here. Semi-automatic handguns with a detachable magazine and one or more of the following features: 1. Threaded barrel 2. Second handgrip 3. Barrel shroud 4. Magazine that attaches to the firearm outside the pistol grip Handguns on the below state rosters are permitted: o California DOJ Handgun Roster o Maryland Handgun Roster o Massachusetts Handgun Roster budsgunshop.com/catalog/feeds/state_reg/washington_dc_restrictions.pdf

Sean, This pistol appears to be prohibited because the magazine well is outside of the pistol grip. The following are prohibited:
Semi-automatic handguns with a detachable magazine and one or more of the following features:
1. Threaded barrel
2. Second handgrip
3. Barrel shroud
4. Magazine that attaches to the firearm outside the pistol grip