[AlejandroSk]

Thank you alan

Its correct?

public fw_TakeDamage(victim, inflictor, attacker, Float:damage)
{
    new Float:dmg = get_pcvar_float(cvar_dmgmultiplier)
    if(is_valid_player[attacker])  
    {
        f (get_user_weapon(attacker) == CSW_AK47 && g_HasAk[attacker])
        {
            SetHamParamFloat(4, damage * dmg)
        }
    }
}