Test this script I just modified..
[pawn]public OnPlayerDeath(playerid, killerid, reason)
{
   new string[51];
   format(string, sizeof(string), "%s has been killed by %s with a %s", gPlayers[playerid], gPlayers[killerid], gWeapons[killerid]);
   SendClientMessageToAll(COLOR_GREEN, string);
   GivePlayerMoney(killerid, 250);
   GivePlayerWeapon(killerid, 26, 270);
   SendClientMessage(killerid, COLOR_GREEN, "You will be upgraded with M4 but limited ammo. Kill somemore to earn more ammo.");
    return 1;
}[/pawn]