He doesn't explicitly advocate gun-control as a solution. Here's his proposed solution:
To be sure, the challenge is enormous. But there are solutions. As we begin to draw down our troop levels in Afghanistan, a brigade or two might be redeployed to violence-prone neighborhoods. Their mission would be not unlike the one they pursued in Iraq: to clear and secure neighborhoods, to protect the local population, and to augment police in counteracting the tidal wave of violence.
To repurpose the army as police officers I guess.
Seems like a dumb idea to me. And probably illegal under the Posse Comitatus Act
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens