The problem with denying people their 2nd Amendment RIGHT based on a criminal record is this: When dissent is a felony, dissenters will be unable to change what they dissent against by either the vote or by force. This short circuits the entire point of the 2nd Amendment. sedition acts have been passed before, so this is not an unreasonable fear.

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War is Peace.
Freedom is Slavery.
Ignorance is Strength.

It's a post 9/11 world.