Blueing is a chemical finish applied to a firearm to prevent rust.
The color can actually be anywhere from black to brown as well as blue.
The amount of blue worn off a used or antique firearm affects it's value.
Apparently they did not condsider the gun worthy of putting in their book. I have seen other gun books with guns that I never heard of in their classified gun book, and important guns not even...
Birchwood Casey...Whatta Joke...That stuff will turn your gun green.I rust blu,which means strip off all the finish down to the bare metal,get a big enough tank to boil water in that'll hold your...