Last month the Army awarded SIG SAUER a contract to build its next generation squad weapons, the XM5 rifle and XM250 machine gun. Both firearms are built around a uniquely designed new cartridge SIG calls the 277 SIG FURY. It’s a “hybrid” design that combines a traditional brass case with a steel base to handle the high pressures the 6.8×51 round will produce.
While SIG will manufacture the new ammo for the Army, so will Winchester at Lake City.