When weapon is fired, Kart barrels ensure that its shot goes straight Shallotte - The nondescript shop a stone's throw from the Intracoastal Waterway doesn't look like a place that's helping the U.S. military's marksmanship units hone their shooting accuracy. Tucked in the woods just south of Shallotte, Kart Precision Barrel Corp. is a small operation with a small workforce involved in an even smaller business field. "It's about as niche as you can get," said President Fred Kart as the company's three other employees manned the metal-working machines scattered around the small workshop. Using short, thin tubes of forged...