He's talking his own gun stock since he's such a proud gun owner. There's only so much conspiracy you can eat in a day
More likely Obama is just taking advantage of these attacks to further their agenda of disarming Americans to make them more "under the control" of the US government. There's a lot of dissatisfaction against the government right now and you have another financial crisis (which many predict is coming in the next few years) then you could have major riots.