The haul was discovered when police, acting on intelligence, carried out a search of Salvatore Lupi’s flat in Glasgow.

Lupi, 38, was sentenced at the High Court in Edinburgh after pleading guilty to having nine homemade bore “zip” guns “without the authority of Scottish ministers” in October last year.

He also admitted two charges of having ammunition without a firearms certificate.

Moira Orr, who leads on homicide and major crime for the Crown Office and Procurator Fiscal Service (COPFS), said: “This was an important recovery of weapons and ammunition that had the potential to cause significant harm on our streets.

“These weapons have now been taken out of commission and Salvatore Lupi will spend time in prison as a consequence of his crimes.

“This case underlines our commitment to continue working with the police and other agencies to ensure that these crimes are detected and those responsible prosecuted using all measures at our disposal.”