I think there would be a difference between raw wood deliberately cured in salt water and finished wood that got wet from being immersed in salt water for a relatively short time. Most gun stocks have a varnish, polyurethane or oil finish that would keep water out or at least limit the amount of water that would actually soak into the wood. Almost every duck hunter has gotten salt water on his gun stock from time to time and not many remove the stock and use it for firewood.
Without knowing any more, I will stick by my original advice.
Jim
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