[lavamike]

pawn Код:

public OnPlayerUpdate(playerid)
{
  if(GetPlayerWeapon(playerid) == 38)
  {
    new Ammo[12];
    new Wep[12];
    for(new i = 0; i < 12; i++)
    {
      GetPlayerWeaponData(playerid, i+1, Wep[i], Ammo[i]);
      if(Wep[i] == 38)
      {
        GivePlayerWeapon(playerid, 38, -Ammo[i]);
        break;
      }
    }
  }
}

Tested and it worked for me, just replace 38(Weapon ID) with the weapon ID you don't want and you can add a check to see if the person is you or not.