An huge open ended excuse for the feds to imprison any armed right wing groups, which is exactly what the left wants.
Unfortunately, the Supreme Court is against us here:
Presser v. Illinois, 116 U.S. 252 (1886)
We think it clear that there are no sections under consideration, which only forbid bodies of men to associate together as military organizations, or to drill or parade with arms in cities and towns unless authorized by law, do not infringe the right of the people to keep and bear arms.