[Kane]

PHP код:

public OnPlayerTakeDamage(playerid, issuerid, Float:amount, weaponid, bodypart)
{
    new Float:player_health;
    GetPlayerHealth(playerid, player_health); 
    if(weaponid == 50)
    {
        SetPlayerHealth(playerid, player_health);
    }
} 


I suppose you could do something like that.