Give me one reason why military-grade firearms should be legal for the common citizen?

Sounds like something is obstructing your buffer. Is there enough room in your buffer tube? Did you use the correct spring?

Did you stuff a second carbine buffer in on top of the one already in there? Did you use a rifle buffer? When you say it won't lock open, lock open how?

Doesn't go back far enough? Latch not engaging even if you do? You need to be more specific for troubleshooting.

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.