Gun Control & RKBA

I don't really know enough about your sovereignty to comment.

Saying that wiki says this:

"On the other hand, the unitary states, like the Indian tribes, cannot print currency or conduct foreign affairs, or exercise other powers assigned by the Constitution to the federal state. Viewed in this light, tribal sovereignty is a form of parallel sovereignty[1] within the U.S. constitutional framework, constrained by but not subordinate to other sovereign entities."

and

"Laws adopted by Native American governments must also pass the Secretarial Review of the Department of Interior through the Bureau of Indian Affairs."

and

"The idea that tribes have an inherent right to govern themselves is at the foundation of their constitutional status — the power is not delegated by congressional acts. Congress can, however, limit tribal sovereignty. Unless a treaty or federal statute removes a power, however, the tribe is assumed to possess it.[25] Current federal policy in the United States recognizes this sovereignty and stresses the government-to-government relations between Washington, D.C. and the American Indian tribes.[26] However, most Indian land is held in trust by the United States,[27] and federal law still regulates the political and economic rights of tribal governments."

https://en.wikipedia.org/wiki/Tribal_sovereignty_in_the_United_States

I'm no expert, but would assume based on the above that the US government would have the means to impose a gun ban on tribal lands... whether or not that makes any sense again I can't answer.

I would have to know more to make any sort of reasonable reply.