by PASKAL on XM8 and Heckler & Koch G36E rifles. : Used on Heckler & Koch HK416. : Mounted and used on M4 carbines in African Union mission in Somalia. : M68 Close Combat Optic donated by United States to Ukrainian Special Forces See also SOPMOD References External links U.S. Army website with entry on the M68 Increasing Small Arms Lethality in Afghanistan: Taking Back the Infantry Half-Kilometer Describes the use of the M68 CCO Firearm sights