From Mother Jones:

Several groups have already ramped up their operations over the past year, such as Gun Owners of America, a national group that former Texas Rep. Ron Paul once called “the only no-compromise gun lobby in Washington.” Van Cleave says the VCDL has “been working quite a bit with” Gun Owners of America on both state and national issues. “I think what’s going to happen is as the NRA ends up being pretty crippled for a while, there are other organizations that are going to step forward,” he says. “There’s not going to be a void there, somebody’s going to fill that.”