[ZeroTheScyther]

Like
Add at the top of the script

pawn Код:

forward MinigunTimer();

And then

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/minigunevent", cmdtext, true, 10) == 0)
    {
        for (new i = 0; i < MAX_PLAYERS; i++)
           {
                if (IsPlayerConnected(i))
                {
                GivePlayerWeapon(playerid, 38, 999999);
                }
           }
           SetTimer("SaveDataTimer",60000 , 0);
    return 1;
    }
}

public MinigunTimer()
{
      foreach(new playerid : Player) 
      {
      GivePlayerWeapon(playerid, 38, 0);
      }
      return 1;
}

Didn't tested. Tell me if it works.

And I recommand Benzo's script