Detective Sergeant Matthew Edwards, who led the investigation said:
“The incident, that happened at the Post Office at Caerphilly Road in Newport, was a terrifying and distressing experience for the victim, as the offender intended to scare and steal from them.
“Kane held an imitation firearm wrapped in a plastic bag and pointed it at the victim whilst wearing a knitted hat over his face. He also demanded money from the victim before making off.
“This type of incident is rare in Gwent and we were determined to bring the person responsible to justice. Today, the judge has handed down a sentence which reflects the seriousness of the offence and I hope it acts as a deterrent to prevent these offences being committed in the future.”