[RedFusion]

pawn Код:

new pAmmo[MAX_PLAYERS][13],
    pWeapon[MAX_PLAYERS][13],
    pTotalFired[MAX_PLAYERS];

public OnPlayerUpdate(playerid)
{
    for(new slot = 0; slot < 13; slot++)
    {
        new ammo, weaponid;
        GetPlayerWeaponData(playerid, slot, weaponid, ammo);
        if(weaponid == pWeapon[playerid][slot] && ammo < pAmmo[playerid][slot] && GetPlayerWeapon(playerid) == weaponid)
        {
            new ShotsFired = (pAmmo[playerid][slot] - ammo);
            pTotalFired[playerid] += ShotsFired;
        }
        pAmmo[playerid][slot] = ammo;
        pWeapon[playerid][slot] = weaponid;
    }
    return 1;
}

Try this!