Black bores and 'Brown guns'
Often when someone offers a gun for sale it is described as having a black bore or a dark bore. What exactly causes this and what, if anything, can be done about it? This condition is often described in conjunction with some line such as 'typical "brown gun". I have seen some pistols that were just a few days shy of being rusty and wonder if this is what is meant by a brown gun. Interestingly, an old Colt SAA in 'Brown or no finish' is still very collectable and valuable but not so in a Luger. Anyone care to explain in a little more detail? Thanks.
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