_assignedItems = {
    private ["_data", "_headgear", "_goggles"];
    _data = assignedItems _target;

    _headgear = headgear _target;
    _goggles  = goggles _target;

    if((_headgear != "") && !(_headgear in _data)) then {
            _data set [count _data, _headgear];
    };
    if((_goggles != "") && !(_goggles in _data)) then {
            _data set [count _data, _goggles];
    };
    _data;
    };

// add assigned items
{
    [_target,_x] call _add;
    _target assignItem _x;
} foreach (_data select 0);