Colorado gunsmith Martin Grier has invented a new kind of rifle—one that can fire up to five rounds at a time through five carefully-aligned barrels, and also ditches traditional metal-encased ammunition for electronically-triggered caseless rounds.

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Photo courtesy of Derek Herrera

For 31-year-old Marine veteran Derek Herrera, the decision to start his own company in June was motivated by a desire to see scientific advancement put to practical use. The company, called Spinal Singularity Inc., is a medical engineering firm that designs medical devices to improve quality of life for people, like Herrera, who are paralyzed due to spinal cord injuries or disease.

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