It's a 58 cal.(green mountain)I did leave the barrel finish bright and letting it age naturally. I may at some point do a rust blue.All the hardware was color case hardened by the folks at Wyoming Armory. I did try a test piece or two at home here in the coal stove but didn't get the results I wanted,a little over my pay grade.The wood was whiskered with water and tannins and then used Jim Kiblers iron nitrate and then Chambers oil finish.That wood finish looks better than the pics show,should have taken the pics on an overcast day......IMHO