When a person is charged with a gun offense, it is not uncommon for them to be charged with several offenses at the same time.
If someone is arrested for illegally carrying a pistol in DC, they can be charged with a felony offense of carrying a pistol without the proper licensing.
In addition to being charged with that felony offense, someone could also be charged with a misdemeanor offense of possessing an unregistered firearm outside of their home or place of business.