A man has been charged over a pair of brazen road attacks, accused of using a four-wheel drive to ram a hatchback on a highway in Brisbane’s south and firing a weapon at the smaller car.

Police say the man deliberately drove the Toyota LandCruiser into the back of a Ford Focus as the vehicles travelled along the Logan Motorway at 6.30pm on April 25.

The 4WD driver allegedly fired a weapon towards the occupants of the hatchback, hitting a woman in the back in the leg.

Police say the same LandCruiser was deliberately rammed into the back of a Ford Focus parked on Grand Plaza Dr in Browns Plains about midday on May 1.

Officers will allege the second collision was a case of mistaken identity, and the driver thought it was the same car from April 25.

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A 30-year-old Logan Reserve man was arrested by specialist police on Saturday at a house in Regents Park after a tip-off through CrimeStoppers.

Detectives said a search of the property revealed three firearms, including a shortened shotgun.

The man is due to face Richlands Magistrates Court via videolink on Monday charged with two counts each of dangerous operation of a motor vehicle, disqualified driving and fail to provide details at traffic crash.

He has also been charged with one count each of discharge weapon in a public place, carry loaded weapon in public place and wounding.

Police have issued a public alert for the LandCruiser they believe was involved in both incidents, with the car yet to be found.