There are far too many variables in your question.
This is a situational question, with no right or wrong answer to fit all conditions.
If you will recall, the individual in Arizona who was armed chose to physically intervene rather than use his firearm.
He assessed the situation, and reacted correctly. Other situations must be individuall assessed and response based on that assessment.
The soldier's pack is not so heavy a burden as the prisoner's chains. Dwight Eisenhower