A man was caught with eight guns after armed police swooped on him in a city centre street.
Paul Duncan was held after his Mazda 6 car was stopped on August 21 this year.
Officers found a self-loading pistol hidden in a sock in the motor as well as "homemade" ammunition during the search in Glasgow's Sauchiehall Street.
Police went on to search the home the 55 year-old first offender shared with his wife in Erskine, Renfrewshire.
Prosecutor Angela Gray told the High Court in Glasgow how a black suitcase was found in a lock-up garage there.
It contained six more converted pistols, a revolver as well as several further packages of ammunition.
Miss Gray: "He was interviewed, but declined to answers questions put to him."
The hearing was told the guns had originally been designed to fire blank cartridges, but had been converted.
The advocate depute: "The pistols, and one revolver, were tested and it was confirmed they had enough energy to be considered lethal barrelled weapons."
Duncan today pled guilty to nine firearms charges including possession of the guns and ammunition.
John Scullion QC, defending, said Duncan had got involved after falling on "hard times".
Lord Armstrong remanded him in custody pending sentencing next month.
