IIRC that is a very square boxlock???
I would bet it will not get worse unless there is some problem with the wood...
Which is likely the nexus of the current problem. any reasonable shotgun smith ought to be able to grind out some wood on the back side and fill it with enough fibers to make the wood invincible.
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.
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