Revolvers are semi automatic. Breach loader or bolt action might be a better metaphor? Anyway, we have enough human bodies laying around that the most ineffect

Revolvers are semi automatic. Breach loader or bolt action might be a better metaphor? Anyway, we have enough human bodies laying around that the most ineffective weapons can be mobilized to grave consequences. What you need is motivation. Also, if north americans are squeamish about developing new weaponry, that just means the rest of the world will catch up and surpass them. This creates a sort of power vacuum which would inevitably lead to an invasion or a civil war. I would argue that that's a worse outcome than outright war.