I should add that I have been taking this gun apart over a series of several months, adding raw
linseed oil
to the inside and outside of the stock. Over this time I have seen no change in the bend in the stock, which is bending down and to the left, away from the barrel. If it was bending upward, a small amount of wood removal could be done.
In this case, I think the best option is going to be attempting the hot
linseed oil
method, however seeing as the barrel channel is thinner it may be easier to try a heat gun first before resorting to the torch.
I'll post my results after trying this later this week.