setWeaponReloadingTime

The description is confusing to me. What the command essential does is to set the reloading state/time of the given weapon. For example you can fire a missile, and make the weapon available to fire again instantly if you apply 0. Or you can delay or stop the reload event indefinitely. The 0-1 range is a percentage - the reload time is taken from the weapons's config value (either reloadTime or magazineReloadTime - not sure). The effect is one time only each - it does not modify the weapon's general reload time.

Works also for infantry weapons - probably useful weapons with longer reload time like sniper weapons or launchers:

player setWeaponReloadingTime [player,currentWeapon player,0];

No idea what's point of the return value.

Note that setWeaponReloadingTime is only having effect on a current weapon state (loaded projectile) so since the projectile is fired the next one will be reverted to a weapon config defaults. To keep the fire rate speed changed over time, use this code:

player addEventHandler ["FiredMan", {
    params ["", "_weapon", "_muzzle"];
    private _type = _weapon call BIS_fnc_itemType;
    private _time = -1;
    switch (_type select 1) do {
        case "SniperRifle" : {_time = 0.5};
        case "AssaultRifle" : {};
        case "Handgun" : {};
        case "Rifle" : {};
        case "SubmachineGun" : {};
        case "MachineGun" : {};
        case "Mortar" : {};
        case "GrenadeLauncher" : {};
        case "BombLauncher" : {};
        case "MissileLauncher" : {};
        case "RocketLauncher" : {};
        case "Cannon" : {};
        case "Throw" : {};
    };
    if (_time isEqualTo -1) exitWith {};
    (vehicle player) setWeaponReloadingTime [(vehicle player), _muzzle, _time];
}];

This Event Handler makes the gun of specific type shoot at a desired rate on each weapon state (sniper rifle will shoot 50% faster in this example). For more information about weapon kinds are there, visit BIS_fnc_itemType.