Former Navy Seal, Craig “Sawman” Sawyer remarked about the outcome of a civil war saying it would be a gruesome massacre with one side having over eight trillion bullets, and the other side not knowing which bathroom to use.
Most other countries will try to side with the left, even our so called 'allies'. It is not going to be as one sided as you might think. The usual suspects will take advantage like China, Iran, N. Korea, Russian, Cuba etc.
Best scenario: We keep our guns and they don't do anything about it. If the left can come up with Sanctuary States, so can we.