From Reason.com:

Anderson also gives short shrift to the transformative right-to-arms conversation surrounding the 14th Amendment. Post–Civil War efforts to extend the right to arms were a direct response to racist gun control in the former Confederacy. The debate surrounding the 14th Amendment demonstrates an explicit aim to extend the right to arms, along with other federal constitutional guarantees, to black people. And there is rich evidence that freedmen considered the right to arms a crucial private resource.