Tony Collopy is now starting a two-and-a-half-year sentence, while his father Kieran is due for release next month after serving an eight-year sentence for heroin dealing.
Kieran is a key member of a notorious gang based in the city's Island Field area and have been aligned to the Keane faction throughout two decades of feuding that left at least 19 people dead.
Last week details of the assault case involving 19-year-old Tony Collopy was heard at Limerick Circuit Court where he admitted using the stun gun and kicking a man in the head.
The violence erupted on Easter Sunday in 2019 when Collopy and another man were asked to leave the Launch Bar at John Street because they had brought their own alcohol.
A fight then broke out in the smoking area during which Collopy "took a taser gun from his pocket" and tried to use it, according to a garda witness.
There were between 20 and 30 people in the pub at the time and sparks from the gun were seen on CCTV footage of the incident.
The fight then continued on the street outside the pub after both men were thrown out, where Collopy was caught on CCTV violently kicking another man in the head area after he was knocked to the ground.
The victim, a man in his 60s, did not co-operate with gardai and no complaint was received.
Collopy's defence lawyer said his client was drunk on the night and had no structure in his life at the time.
He described him as "running feral" and as being out of control and taking drugs at the time.
He said Collopy had since made significant efforts to rehabilitate himself while his guilty plea was "incredibly valuable" given the growing court lists.
Judge Tom O'Donnell said the video footage played in court was "chilling" and the level of violence "truly shocking".
He said it was unacceptable for anybody to be "walking around the streets of Limerick armed with a taser", while his previous convictions were also a concern.
He imposed a three and-a-half year prison sentence, suspending the final 12 months.
Ironically, Collopy's father will be coming out of prison just as he begins his stretch inside.
Kieran Collopy got an eight-year sentence after being caught red-handed along with his brother Brian with €38,000 worth of heroin.
It emerged earlier this year Kieran Collopy had a house repossessed by the local authorities in Limerick as a result of his illegal activities.
The move is just one of many in a legal onslaught against the gang who played a key role in the city's underworld feud.
Kieran had said he would not get involved in anti-social behaviour when released from prison and wanted to return to the house at St Ita's Street, Limerick.
He gave evidence in court as he appealed a previous decision in 2016 by the city council to take back the house at St Ita's Street.
He argued that he had since broken up with his partner and the house is the only place he can go to live when he has completed his sentence.
He said it had been left uninhabitable while he had previously been in prison.
It emerged that while he had been a council tenant since 2005, he hadn't lived at the property for several years.
The council argued that while his drug dealing took place at another address in the area it was still a breach of his tenancy agreement.
It was also heard gardai are concerned about how the property is being used, and Collopy made no attempt to keep it secure it or stop it being used by other people.
Sunday World also previously revealed how Brian and Kieran Collopy continued to deal drugs behind bars, where they were suspected of controlling the supply into Limerick Prison.