LIBERAL Senator Bill Heffernan has taken a mocked-up pipe bomb into Parliament House to show new security arrangements are "a joke".
Under the new system, some passholders and their belongings are not scanned when entering the building.
Senator Heffernan says the building is "no longer secure".
"To demonstrate that, this morning, I brought in what could be.. I brought this through security - a pipe bomb," he told a Senate Estimates hearing, as he held up a metal pipe.
He also held up what appeared to be an electronic device.
"When I was a kid, we used to blow stumps out on the farm - 50 years ago," he said detailing the ingredients for his home-made bombs.
"We could blow a tree the size of this building out of the ground.
"At the present time, there is nothing to stop anyone from bringing those ingredients in here over a period of time through security."
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