The M338 machine gun and the ammunition it makes to fire out of the new weapon officially have been officially by the U.S. military as safe for testing.
The NGSW-AR is the successor to the now-defunct Lightweight Small Arms Technologies machine gun program. Textron’s submission for the NGSW-AR appears to be a reworking of its LSAT prototype, albeit chambered for a new caliber with a few visual differences, including a new stock.