Create a soldier with a sidearm, the GL version of an assault rifle and an AT launcher. Make sure all of them are loaded. Give him 2 pistol mags, 2 40mm grenades, 2 rifle mags and 2 rockets/missiles. Save the loadout and either use it in the editor or a Zeus scenario. The soldier will be spawned with one pistol mag, one 40mm grenade, one rifle mag and one rocket/missile.