No, you're not allowed...

Isn't Self-Defense Common Sense?

Obama evidently considers that de facto prohibition a "common-sense regulation," since he recently cited Washington's law as an example of constitutionally permissible gun control. "The notion that somehow local jurisdictions can't initiate gun safety laws to deal with gangbangers and random shootings on the street isn't borne out by our Constitution," he said.

The D.C. gun law, passed in 1975, isn't really about gangbangers, which it has not exactly disarmed, or random shootings on the street, which it has not noticeably curbed. In effect if not intent, it is about disarming law-abiding residents who might want to protect themselves from gangbangers and other violent criminals.