The XM250 is a lightweight, belt-fed, select fire, 6.8mm light machine gun ... Both are chambered in the legacy 5.56 mm cartridge. The Army is leading the project, while the Marine Corps and ...

5 on a 6.8 mm ammunition production facility at Lake City ... Both are chambered in the legacy 5.56 mm cartridge. The Army is leading the project, while the Marine Corps and Special Operations ...