making ai take more damage

Anyone know how to make enemy ai take twice the damage? We are using robert hammers m4 pack but they are underpowered...

This is a script used for testing, replaces fired bullet with another type:

_soldat = _this select 0;

TAG_fnc_kugelErsetzen = 
{
_kgl = _this select 0;
_vel = velocity _kgl;
_pos1 = getPosATL _kgl;
_nKgl = "B_127x108_Ball" createVehiclelocal _pos1;
_nKgl setVelocity _vel;
};

_soldat addEventHandler 
["fired", 
	{
	if (_this select 1 == (primaryWeapon (_this select 0))) then 
		{
		[_this select 6] call TAG_fnc_kugelErsetzen;
		}
	}];

/*
"B_762x51_Ball"
"B_127x108_Ball"
"B_20mm"
*/

You can add a damage handler to the AI

example (assuming the enemy are EAST):

add to init.sqf

{
if ( side _x == EAST ) then {
	_x removeAllEventHandlers "HandleDamage";
	_x addEventHandler ["HandleDamage",{
		_damage = (_this select 2)*2; // <-- the *2 multiples the damage by 2
		_damage
	}];
};
}forEach allUnits;

You can add a damage handler to the AI

example (assuming the enemy are EAST):

add to init.sqf

{
if ( side _x == EAST ) then {
	_x removeAllEventHandlers "HandleDamage";
	_x addEventHandler ["HandleDamage",{
		_damage = (_this select 2)*2; // <-- the *2 multiples the damage by 2
		_damage
	}];
};
}forEach allUnits;

Thank you for this! This works amazingly. It's so nice watching guys drop after 2-3 shots and a headshot doing the job the first time. I need help with one thing. My unit use MCC a lot to make missions and this doesn't work on spawned units like that unless I make it run from some sort of trigger. How would I go about making it loop every 5 or so minutes. I tried adding "while {true} do and a sleep at the end but I didn't do it right. I'm still new to scripting and haven't started learning conditions and event handlers yet.

Put this loop into a file called initServer.sqf in the mission folder or execVM the loop file from initServer.sqf.

while {true} do 
{
    {
     if ( side _x == EAST) then 
            {
                    if (_x isKindOf "Man") then
                    {
     	              _x removeAllEventHandlers "HandleDamage";
	              _x addEventHandler ["HandleDamage",{_damage = (_this select 2)*2; _damage}];
                    };
     };
    }forEach allUnits;
sleep 300;
};

or

[] execVM "damageLoop.sqf";

https://community.bistudio.com/wiki/Event_Scripts