<soldier/veh> setAmmoFuseDistance [<muzzle>, <ammo class name>, <distance>]

For setting the fuseDistance parameter for given ammo type fired from given muzzle.
Would behave like setWeaponReloadingTime and return to the configged value after the first shot fired after applying this command.

player setAmmoFuseDistance [currentMuzzle player, "G_40mm_HE", 999999]; //dud nade