A 46-year-old man has been charged and will appear in court tomorrow, in connection with the seizure of a gun in Artane in Dublin earlier this year.
The gun was discovered and seized after two cars were stopped in the area on Saturday 14th September.
The man who has been arrested is due to appear before the Criminal Courts of Justice tomorrow morning.
Three men were previously arrested in connection with the investigation.
One of them - aged in his 50s - was charged and later appeared in court.
The two others - aged in their 20s and 40s - were released without charge and a file was sent to the DPP.