I've done the re-attachment on several guns and have used the dowels as mentioned above and have also used wood working type biscuits. Both need to be held in place with small wood screws in pre-drilled holes and countersunk. I have used the 2 ton epoxy as it dries slower and allows more time for proper alignment. The "fix" is going to show no matter what you do and it sounds like yours may show more than normal.
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