No, he will break out his rifle again to show how pro-gun he is and the voters will fall for it.
Why not? The NRA is stupid enough to fall for Harry Reid's pro-gun schtick.
In fact, if Manchin votes for a little taxpayer pork (like Harry), perhaps a government-funded gun range, I fully expect the NRA to give him an "A" rating in exchange for his donation of other people's money.