High Noon in Mayberry - S3-E17
Question: When Luke Comstock called Andy to let him know he was coming over, why did Andy choose not to keep himself armed in the event Luke's intentions proved sinister? Andy had no way of knowing ahead of time if Luke was coming back to seek revenge on him. Barney even said that the person matching Luke's description was seen carrying a shotgun. Luke was armed, so Andy should have been just in case Luke tried anything.
Answer: Throughout the show, it is established multiple times that Andy doesn't use firearms. (At least not for police work.) He has the ability to de-escalate most situations without resorting to force or the threat of violence.