[AndreT]

Judging from this, pistols are in slot 2 (this would be different for every weapon-specific clip that you take out of your inventory). To get the weapon data of slot 2, do this:

pawn Код:

new weapons, ammo;
GetPlayerWeaponData(playerid, 2, weapons, ammo);

Then, to check if there are no bullets left, just do

pawn Код:

if(!ammo)
    // yup, out of bullets

Edit
Why not also use the function GetPlayerWeaponState and check:

pawn Код:

if(GetPlayerWeaponState(playerid) == WEAPONSTATE_NO_BULLETS)
// same as
if(!GetPlayerWeaponState(playerid))