The M4's daddy. Comes with a compensator on the muzzle in order to offset the high recoil of the weapon. It was made as a shorter counterpart to the M16, whose long 20" barrel was an encumberance in close-quarters combat. In Paternian service, it is known as the Submachine Gun, Caliber 5.56mm, M177. It was classified as a submachine gun on account of its intended role that the technical characteristics. Despite the apparent advantages, universal replacement over submachine guns and light carbines is nonexistent. Regular soldiers are issued the M16 or M4 due to its greater controllability and the ability to use attachments such as the M203 grenade launcher or bayonets. Vehicle crews are still issued MP5, M20, or M9 submachine guns due to the fact these weapons are already in the inventory and procuring defensive weapons for vehicle crews is not a priority. However, the Paternian Navy and Scout Rangers have adopted the weapon wholeheartedly, as it fulfills their needs the best. Even so, the Paternian Navy and Scout Rangers still use regular submachine guns and longer carbines and rifles as they are more suitable in certain situations.