Assuming he meant "nightmare", a young Canberra family would probably agree after the tiler shot up their home and sent them desperately running for cover in a terrifying attack last November.

Antoniak, 32, on Wednesday admitted peppering the Narrabundah house with bullets in broad daylight, pleading guilty to three charges in the ACT Magistrates Court.

They were discharging a loaded rifle in an act endangering life, intentionally damaging property, and using a prohibited firearm.

A further three charges were withdrawn following prolonged negotiations between prosecutors and Antoniak's lawyer, Michael Kukulies-Smith.

Agreed facts tendered to the court on Wednesday show Antoniak and his victim, a former friend, were embroiled in a dispute about the ownership and whereabouts of a ute he wanted returned to him.

Antoniak travelled to the victim's Goyder Street home about 12pm on November 3 last year and argued with the man before leaving.

He returned in a silver Holden Commodore about 2.40pm, jumping out and yelling at the victim to come outside when he arrived.

The 32-year-old then kicked a hole in an aluminum gate at the side of the house before moving to the front yard and booting the windscreen of the victim's Ford Focus, causing it to crack.

The victim and his partner emerged from the house and spotted Antoniak, who reached into the passenger side of the Commodore and pulled out a sawn-off rifle.

He began firing at the victim as the man and his partner ran back inside "in immediate fear of their lives".

The victim quickly made a panicked triple zero call, saying: "He's got a gun. He's at my house. He's got a gun."

He could be heard telling his family, including children then aged seven months and 18 months, to "get in the bath".

When the triple zero operator asked who had the gun, the victim replied: "Brodie Antoniak."

Antoniak continued shooting at the house and eventually got back into the front passenger seat of the Commodore, which drove away before doing a U-turn and coming back.

The self-employed tiler fired a further two rounds into the front of the house before finally fleeing.

A total of five bullets entered the house, with four flying through the master bedroom window and the other travelling in via a window beside the front door.

Antoniak and the man who had driven him to the Narrabundah address subsequently hid the gun in the Coppins Crossing area.

A short time later, the 32-year-old sent the victim two text messages, warning the man "you've got till 5am to return the ute" and "5am maggot".

Antoniak was arrested later that night at his former partner's unit in Wright after police spotted the Commodore parked outside.

A forensic examination found gunshot residue on the front passenger seat, and Antoniak was deemed a possible match for DNA located inside the car.

Two days later, a police firearm detection dog helped investigators find the gun, which had been wrapped in a Tommy Hilfiger jumper.

Antoniak, who has been in custody ever since his arrest, entered his guilty pleas over the phone from the Alexander Maconochie Centre on Wednesday morning.

Magistrate Glenn Theakston committed him to the ACT Supreme Court for sentence on a date yet to be fixed.

Antoniak's case his been listed for directions in the superior court next Thursday.

The man accused of driving him to and from the scene of the shooting, 22-year-old Jordan Crooke, was only charged last month.

Mr Crooke, of Batemans Bay, is on bail and has not yet entered pleas to two counts of aiding and abetting Antoniak's crimes.

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: