Those offsets show how many of which ammotype one player has. This should give you the hint, but i can't test it now. Put it in a simple command or something.
PHP Code:
new iCurrentWeapon = GetPlayerWeaponSlot(client, 0);
decl String:sWeaponName[32];
if(iCurrentWeapon != -1)
{
new iAmmoType = GetEntProp(iCurrentWeapon, Prop_Send, "m_iPrimaryAmmoType");
new iClip2 = GetEntData(client, FindSendPropOffs("CCSPlayer", "m_iAmmo")+(iAmmoType*4));
new iClip1 = GetEntProp(iCurrentWeapon, Prop_Send, "m_iClip1");
GetEdictClassname(iCurrentWeapon, sWeaponName, sizeof(sWeaponName));
PrintToChatAll("%N has %d/%d in his %s", client, iClip1, iClip2, sWeaponName);
}
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