The Brazilian men appeared in court before Tullamore Circuit Court.
Three men pleaded guilty yesterday to committing firearms offences in Clara at a sitting of Tullamore Circuit Court.
Ildomar Cabrar Da Silva, aged 29, of no fixed abode; 34-year-old Jefferson Dos Santos, Apartment 4, Inny Court, Ballymahon, Co Longford; and Hugo Henrique Rodrigues, aged 23, of the same address in Ballymahon, pleaded guilty to the unlawful possession of a 9mm PPS submachine gun, possession of 17 rounds of ammunition for that weapon, and possession of four 12-gauge shotgun cartridges.
The offences were committed at River Street, Clara on May 27 last.
The men are in custody in Cloverhill Prison.
Mr. Dos Santos was brought to Tullamore Circuit Court for his arraignment and the appearances of Mr. Da Silva and Mr. Rodrigues were by video link.
They were ordered to appear before Tullamore Circuit Court again on November 26 for sentencing.