The confrontation took place in the Magdalene Court estate in Kells and the Cavan/Meath branch of the IRSP confirmed the incident, which took place on Wednesday November 10th, on social media.
They posted on their Facebook page, saying, "Tonite, (sic), some of our members were in Kells, Co. Meath at the request of multiple members of the community who asked us to show a presence in certain areas that have been subjected to anti social behaviour recently.
"Gangs of teens have been terrorising the area , attacking passers by , breaking windows in houses and shooting fireworks at elderly people.
"This behaviour will not be tolerated in working class community’s (sic) while we are active.
"We spoke to a number of residents who thanked us for not abandoning them and they even came out and applauded us as we confronted the culprits and forced them to disperse from the area."
One eye witness revealed: "There was a large number of them, some masked, and they basically took it to the teenagers who have been causing havoc.
"There was no actual violence that I could see but the young lads were left in no doubt that was the next step and backed away because they realised they were playing out of their league.
"The IRSP statement is accurate in relation to the young lads behaviour they have been upsetting and annoying people, especially the elderly for a long long time and residents were just fed up of it.
"I know these guys will be labelled vigilantes but when nobody else is able to help where do you turn to, getting them in was the last resort."
However Aontú leader, Peadar Toibín, a TD for the area has slammed the IRSP actions.
"Under no circumstances can a vigilante group be allowed to operate in Meath or anywhere else in the country.
"I accept the residents frustrations but what they really need is more action from the Gardaí and the local council in tackling anti social behaviour.
"The IRSP or anyone else cannot be allowed to enforce their rule by using threats of violence, we simply cannot accept vigilantes being allowed operate freely."
A Garda spokesperson said: "There was no incident recorded in Magdalene Court on 10th November 2021.
"Gardaí based in the Kells District did carry out a number of proactive patrols in this residential area over the weekend."
The IRSP branch have been contacted for comment.