Depends on what you mean by "replica." If your mean a functioning replica of an m-16, it is illegal. If you mean a non-functioning muzzle-loader, then federal law would not preclude it, although I haven't checked your state law. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.