Does anyone know if the M5 3in guns used by the US Army 3rd infantry Honor Guard in D.C. Are black or black green?

Either way, great excuse not to get out of weathering

http://www.google.com/imgres?hl=en&client=ubuntu&sa=X&channel=fs&biw=1366&bih=606&tbm=isch&prmd=imvns&tbnid=_iArInvg1nF5kM:&imgrefurl=http://ja.wikipedia.org/wiki/%25E3%2583%2595%25E3%2582%25A1%25E3%2582%25A4%25E3%2583%25AB:3-inch-Gun-M5-Andrews-20050520.JPEG&docid=y-1vUZmN8yzPHM&imgurl=http://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/3-inch-Gun-M5-Andrews-20050520.JPEG/1280px-3-inch-Gun-M5-Andrews-20050520.JPEG&w=1280&h=834&ei=brc1T7SWI-Xl0QHBvPHjAg&zoom=1&iact=rc&dur=203&sig=116036160499386551208&page=3&tbnh=135&tbnw=180&start=42&ndsp=24&ved=1t:429,r:14,s:42&tx=149&ty=117

They are gloss black with polished chrome accents such as the breech, wheel rings, lug nut, etc. that you see in the picture.

Thanks
I wasn't sure how far off the color was in the pictures.