As far as I know, all of them - USSR, Cuba, China, Vietnam, NK etc, implement gun control. Why should their governments do that? The people of these states genuinely support(ed) socialism, if they are/were all armed they can protect socialism far better than the 1% of the population that makes up the military.
A person with a gun isn't military power. And frankly, a million people with a gun isn't either.
A million people with a gun is a militia, it literally is military power. Or do you mean in a rhetorical sense i.e they wont be effective?
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What I meant by that was that a single person or many individuals with guns don't make an army because they aren't. They don't have the force projection, the infrastructure, the industrial capability, mechanics, planning, strategy, training, etc, etc. War and armies were a thing long before guns were invented. I would say having the shooty things is almost the least important, but somehow Americans love to focus on it. If the workers control the means of production they also control the means of weapon manufacturing by the way, just wanna throw that out there. And we love our Mao quote "Political power grows out of the barrel of a gun", but that is meaningless if you take that statement at face value and you think he literally just meant "have a gun".
I do stress gun ownership in current circumstances in the states though, for incidental protective reasons. Too many right wing psychos on the loose.