Labour says SAS troops are not receiving equipment they need for combat and are using their own money to buy it online.
During the court martial of an SAS soldier last week, the accused said he did not return military gear which he mistook for gear he bought himself.
During the hearing, the trooper said he spent more than $US15,000 of his own money on tactical and protective equipment for weapon modification.
Labour's defence spokesperson, Phil Goff, says the Government is responsible for providing soldiers with the best equipment to keep them safe.
He says the fact the soldier bought his own suggests the Government is failing in that responsibility.
But a former chief of the Defence Force says there's nothing unusual about Special Air Service soldiers buying their own equipment.
Major-General Lou Gardiner said there is a culture of soldiers buying and swapping amongst themselves and the SAS is well resourced.
And the Defence Minister responded to the allegations on Morning Report: