The non-jury trial of two Limerick men accused of murdering businessman Roy Collins has been shown a semi-automatic pistol gardai believe was used in the shooting.

Wayne Dundon of Lenihan Avenue, Prospect and Nathan Killeen of Hyde Road, Prospect deny the killing at the amusement arcade he ran at the Roxboro Shopping Centre, on April 9th 2009.

Roy Collins (35) died after he was shot once in the chest at the Coincastle Amusement Arcade.

It has been suggested by several witnesses in the trial that the target of the attack was his father, Steve Collins, who ran a pub next door.

The prosecution alleges Wayne Dundon organised the murder from prison, that his co-accused Nathan Killeen was the getaway driver and another man - James Dillon - was the gunman.

Today the Special Criminal Court has been shown the alleged murder weapon - a glock semi-automatic pistol that was found loaded in rugby grounds three years after the attack.

The court heard its serial number had been deliberately obliterated.

Garda ballistics experts say tests reveal the markings on a discharged bullet found at the crime scene indicate it was fired from this rusted handgun.