Henry Bowman is a fictional character from a novel that was published 20 years ago, so Henry Bowman is doing nothing. While John Ross wrote a damn good novel in my opinion, it was still a work of fiction. Enjoy the read, and then come back to the real world. If a Henry Bowman analog did exist in the real world, Obama would not have been elected, the NFA, GCA68, and GCA86 would have been repealed, and you'd be able to pack a sidearm in any of the 50 states without needing permission. Or possibly more likely, some fudd would have turned him in, he'd be occupying Tim McVeigh's old cell, and "responsible gun owners" would be decrying his "terroristic actions."
However, so far the whole RKBA thing has come down to state's rights issue which is why shitholes like Connecticut and New York ban MSRs, and 11 states have done the right thing with Constitutional Carry. So I suppose realistically Henry Bowman would have listened to Atlas, moved to a free state, and otherwise just shrugged. It would have been the smartest thing to do.