The Biofire Smart Gun: It’s Still Just a Prototype, But It Seems to Be a Promising One

In John Scalzi’s military science fiction series Old Man’s War, protagonist John Perry joins the mysterious Colonial Defense Forces, essentially a space force from Earth sent around the universe to fight aliens. It sounds ridiculous in almost every way, with elderly Earthlings receiving new, improved bodies, with the exception of a considerable amount of plausible technology.

Colonial Defense Forces soldiers are issued guns that can only be fired by the soldier the gun is issued to.

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