The South Australian Government said it would take more steps to crack down on gun crime.

Premier Jay Weatherill said new offences would be created and police given wide-ranging additional powers.

Under planned changes to the Firearms Act, the trafficking of firearms will become an offence, with a maximum prison sentence of 20 years.

People unlawfully in possession of a loaded firearm could face a fine of $75,000 or 15 years in jail.

Mr Weatherill said police would be given greater search powers and the authority to seize equipment used for manufacturing and altering firearms parts.

"These proposed reforms build on tough new laws we introduced in March this year and send a very clear message that the trafficking, supply, unlawful possession and use of illegal firearms will not be tolerated," he said.

"We are not the United States of America. There is no right to bear arms in this state."

Police Assistant Commissioner Linda Williams said more support for police efforts would be welcome.

"We believe these amendments to the Firearms Act will improve public safety," she said.

"This legislation will be focused squarely on illegal weapons and the criminals who use them."

Shadow attorney-general Steven Wade said the Opposition supported the latest measures but the state was lagging behind the rest of the country.

"Most other states have had this sort of legislation for 10 years, we're the last state to get them," he said.

Planned changes to Firearms Act It would become an offence to traffic in firearms, with a maximum penalty of 20 years in jail. Government plans to broaden possession legislation to make it an aggravating factor if an unlawful weapon is loaded, exposing the offender to a maximum penalty of a $75,000 fine or 15 years in jail. Planned to make it an offence to possess a detachable magazine with a capacity of more than 10 rounds, with a maximum penalty of a $10,000 fine or two years in jail. Would become an offence to be in possession of a silencer, mechanism or fitting found together with a firearm, with a maximum penalty of a $75,000 fine or 15 years in jail. It would become an offence to reactivate, or attempt to reactivate, a deactivated firearm, or to make alterations to a firearm which changes its legal classification.

Blood and saliva testing

Offenders are set to face mandatory tests if their blood or saliva come into contact with police.

Mr Weatherill will outline the measure when he speaks at the Police Association conference on Tuesday.

He said police officers already had blood tests after such incidents but some diseases were not detectable for months.

Mr Weatherill said testing an offender would give faster results and help reduce anxiety for police officers about their risk of infection.

"It also means that if the person does have an infectious disease then the police officer can get on with some preventative treatment very quickly, knowing what disease has to be targeted so it's very important for the health and wellbeing of our police officers who are putting themselves in harm's way just to protect us," he said.

The SA Government said that in the past year there were 279 cases of officers coming into contact with blood, 118 incidents involving police being spat on and twice when officers suffered needle stick injuries.