Sigh. Still supporting Dred Scott I see.
Still having me guess WTF you mean by that I see. I'll just take a WAG and assume you're referring to the "Negroes with guns" paragraph.
If you would actually read the decision instead of having someone tell you what it means, you'd find that Justice Taney, in that paragraph, was referring to rights extended by the individual state. That if a "person of the Negro race" was made a "Citizen of the state" in which he resided he would have all the rights of other citizens of that state, including the RKBA "wherever he went".
It had nothing whatsoever to do with the second amendment.