But, if it was 50,000 armed U.S. citizens vs 1,000 NKs or Chinese.... I'm gonna give the edge to the pissed off rednecks. I think the "hunters" wouldn't take kindly to a foreign invading force. While under "normal" circumstances, hunters might turn tail and run when rounds come their way... I submit that they will NOT accept submission to a bunch of Chinese or NKs or Russians and will find the needed courage to face them down. Because if they don't... they're going to die anyway. Better to die in a pile of brass than on your knees while watching them rape your wife and daughter, eh?
Of course, this is all fantasy. They aren't going to send infantry. As I mentioned earlier, the logistics required to transport a substantial number of potential enemy troops to our actual shores is beyond the capabilities of most, if not all countries out there. If they were to attack us, I suspect it will be via ICBM or other air attacks, including electronic countermeasures to disrupt our communications, power, and financial infrastructure.