Looking for the U.S. Military's Gun of the Future? Try Sig Sauer’s MG 338 Heavy Machine Gun An Instagram video of the MG 338 at the 2020 SHOT Show is revealing. There was a prodigious amount of recoil, despite the mitigation mechanism. Here's What You Need to Remember: Not everyone is on board. Dr. Orr described why the extending grunt’s range might be a well-intentioned, but misplaced goal. In a press release on the Sig Sauer website, Sig announced that its MG 338 machine gun completed a safety certification in tandem with United States Special Operations Command (USSOCOM), and completed delivery of ammunition, suppressors, and MG 338 machine guns for trials.