D.C. Mun. Regs. tit. 24, r. 24-2301
No person under the age of eighteen (18) years shall carry or have in his or her possession upon any street, avenue, road, alley, park, or other public space in the District, any gun, pistol, rifle, bean shooter, sling, projectile, dart, or other dangerous weapon of any character.
Nothing in this section shall be construed as to prohibit a member of a duly authorized military organization from the proper use of the guns and other equipment used as a member of the organization.
It shall not be lawful for any person to carry or have in his or her possession outside any building in the District an air rifle, air gun, air pistol, B-B gun, spring gun, blowgun, bowgun, or any similar type gun.
Nothing in this section shall be construed as prohibiting the transportation of an air rifle, air gun, air pistol, B-B gun, spring, gun, blowgun, or bowgun, unloaded and securely wrapped, by a person who is eighteen (18) or more years of age.
Nothing in this section shall be construed as prohibiting the use of an air rifle, air gun, air pistol, B-B gun, spring gun, blowgun, bowgun, or any similar type gun, where the use of the gun is supervised by a person eighteen (18) or more years of age in connection with the following:
D.C. Mun. Regs. tit. 24, r. 24-2301