Two men who pleaded guilty to robbing a post office in Wragby were sentenced at Lincoln Crown court on October 24.
Patrick Middlebrook (51), of Daniel Hill Street, Sheffield, and Kirk Marlow (29), of Musgrave Crescent, Sheffield, went to the post office on May 5.
Inside, the pair threatened the postmaster with a sawn-off shotgun and a knife before leaving the scene with cash.
Middlebrook, who was described by the judge as a dangerous person, was sentenced to 20 years imprisonment, with a minimum of 10 years before being eligible for parole. Marlow was sentenced to 12 years imprisonment.
DC Gary Hugo said: “This was a violent offence that caused a great deal of distress to the victims and left a community shaken.
“The victims’ lives changed dramatically on the day of the offence. They were left fearful and distrusting of people.
“The sentences have provided a degree of closure to the victims and will go some way to enabling them to move on from the horrific incident”.
“The case was fast-moving and we are grateful to our colleagues in South Yorkshire Police who assisted us that day, enabling both offenders to be caught within a matter of hours.
“The sentences that the offenders received reflects the severity of the offence”.