[Logofero]

Other methods do not. You can do this via the Memory hack, but it will be more difficult.

PHP код:

new bool:p_infinity[MAX_PLAYERS];
#define MAX_INFINITY_AMMO   (9999)
public OnPlayerSpawn(playerid) {
     p_infinity[playerid] = true;
     return 1;
}
public OnPlayerUpdate(playerid) {
    static
          p_ammo[MAX_PLAYERS]
    ;
    new weaponid = GetPlayerWeapon(playerid);
    if (p_infinity[playerid] && weaponid && p_ammo[playerid] > GetPlayerAmmo(playerid) || p_ammo[playerid] < MAX_INFINITY_AMMO) {
          GivePlayerWeapon(playerid, weaponid, MAX_INFINITY_AMMO);
          SetPlayerAmmo(playerid, weaponid, MAX_INFINITY_AMMO);
          p_ammo[playerid] = MAX_INFINITY_AMMO;
    }
    return 1;
}