Next up is that the FNH M249 SAW, the best light machine gun commonly employed by the U.S. military. Durable, accurate, and also capable of high rates of suffered fire, the M249 SAW excels in providing suppressive firepower on the battlefield.First on our list is the FN SCAR 17S. This popular battle rifle features a gas-operated, short-stroke piston system and is chambered in the mighty .308 Winchester caliber. Using Its ergonomic design plus exemplary accuracy, it is little wonder the SCAR 17S is very popular through both military and civilian shooters.