Mark John O'Leary is listed as an outlaw gang member and associate of the Renegades motorcycle gang.
He has a history of mental illness and suicidal tendencies and is considered anti-police but on June 19, police decided he should be allowed to carry a gun.
The warnings detail allegations against police and that he may be in possession of venomous snakes, but Mr O'Leary is considered suitable to help guard the public.
Frontline police are ''horrified'' that fellow officers from the Weapons Licensing Division have ignored his criminal and mental history to allow the 36-year-old Currumbin man to be armed in public despite his file being marked ''Not suitable applicant'' to legally carry a gun.
Senior police have issued safety warnings to all officers across the region.
According to his licence details obtained by the Bulletin, Mr O'Leary is only allowed to carry a weapon when working as a security guard.
It does not reveal which company he works for, or which businesses he may guard.
''This does not include working as a doorman on a licensed premises or carrying out general duties (door rattling),'' the warning states.
''Duties which may involve dealing with ATM call-outs, escorting cash or valuables may be considered to be activities which necessitate the carriage of a firearm.''
Officers have been urged to document any breach of his licence conditions and document his activity.
Police yesterday called for the licence to be revoked.
''His licence was stripped off him in 2006 for a good reason,'' a senior policeman said.
''He has twice been hospitalised in the mental health unit under an emergency examination order. He is listed as suicidal and he may have venomous snakes. He hates police, so they give him a gun?''
Officers said Mr O'Leary's history clearly showed he was not suitable to be working in security, or to be allowed to carry a weapon.
''He ticks all the warning flags,'' said the senior officer. ''This should never have got through. This is an absolute joke and it could put police and the public at risk.''
Weapons Licensing is a work unit within the
Administration Division of the Queensland Police Service.
The unit has been dealing with a backlog of licence applications and renewals after the changes to the Weapons Act to ''reduce red tape'' the Police Service website says.
Criminal lawyer Bill Potts said the safety of others must be considered before issuing a weapons licence.
''It is a concern when a person with a psychological and criminal history is allowed to carry a weapon.''