I find that the phrase "Kids with Guns" is referring to the youth being handed anything and everything without consequences or the responsibility of experience. "But it won't be long", at the rate the youth is being forced to grow up and interact with an ever-increasing lack of experience in being able to handle what comes. Eventually society will just be handing kids guns and expecting them to act appropriately.
I find that the phrase "Kids with Guns" is referring to the youth being handed anything and everything without consequences or the responsibility of experience. "But it won't be long", at the rate the youth is being forced to grow up and interact with an ever-increasing lack of experience in being able to handle what comes. Eventually society will just be handing kids guns and expecting them to act appropriately.