Not a clue on the cost, but unless the barrel is totally sewer piped, you probably don't have to worry about the pitting. I've got a few firearms with barrel pitting that shoot surprisingly well.
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"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
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