I'm not very good at taking pictures but these are the best I have. It's a nickel boron finish, and it looks a little bit darker in person than it appears in these pictures. This G27 had a test-fire date in 2009 and came with a rough/matte black slide finish instead of Glock's traditional shiny black slide finish. The original finish on this slide was not very durable at all, it scratched and wore down quite easily. I also found some very light surface rust in the slide's internal areas after only one year of owning it. At first I wanted to get it refinished in a black finish but since this was my carry gun I wanted the most durable and corrosion resistant finish I could get, plus OD/nickel looks pretty nice.