Changes to firearm laws in Tasmania are expected to take more guns off the streets.

The Police Commissioner is set to announce that firearm dealers will no longer be amnesty points.

Under Tasmania's permanent firearm amnesty, people with unregistered and unlicensed guns can hand them into police without fear of criminal charges.

Guns can also be handed in to registered firearm dealers who can then register and sell them.

The anti-gun lobby says the practice defeats the point of the amnesty because guns are not being permanently taken off the street.

About 300 firearms have been handed into mobile amnesty sites run by police across the state over the past six months.

Commissioner Hine is expected to announce the changes later today.

Police do not expect it will mean a fall in gun surrenders.