Mr Pawson said despite feeling "a bit" frightened by the incident, he went on to serve three customers who came into the Den immediately afterwards.
"We had three visitors for the Den and I just told them: 'I've just been robbed at gunpoint but don't panic, the police are on their way, it's under control'.''
His wife took down the licence number of the offender's vehicle and passed it on to police.
Central District Police spokeswoman Kim Perks said a 48-year-old Masterton man was arrested in Woodville about 90 minutes after the incident.
He will appear in Palmerston North District Court this morning charged with aggravated robbery and unrelated charges of stealing a jacket and a lamp from a farm in Martinborough earlier this week.