params ["_unit", ["_rounds", [8, 16]], ["_delay", [10, 20]]];

while { alive gunner _unit && canFire _unit} do
{
	_amount = (_rounds select 0) + floor random ((_rounds select 1) - (_rounds select 0));
	_target = (_unit modelToWorld [0 + random 1800, random 500 + 1600, random 2500 + 3500]);
	_unit doWatch _target;
	sleep random (_delay select 0) + ((_delay select 1) - (_delay select 0));
	for "_i" from 1 to _amount do
	{
		if (! alive gunner _unit) exitWith {};
		_handler = _unit addEventHandler ["Fired", { (_this select 0) setVariable ["a3f_shot", true]; }];
		_unit doWatch _target;
		_unit fire [(weapons vehicle _unit) select 0];
		waitUntil { !isNil { _unit getVariable "a3f_shot" } };
		_unit removeEventHandler ["Fired", _handler];
		_unit setVariable ["a3f_shot", nil];
	};
	_unit setVehicleAmmo 1;
};

	//_aa = [this] execVM "aaa.sqf";
	//_aa = [this, [3,5]] execVM "aaa.sqf";