Many of the military accurange scopes were blued, typically matte. I nearly bought the most documented m40 I have ever seen. It was unfired since it was awarded to a match winner, in the brown case, plaque in the winner's name, paperwork in his name, everything was there. It had a gloss blue accurange, which some say never happened but I can assure you it was gloss and a very high end collector who has 6 original M40s bought it and it was not cheap. It would have been mine in 15 hrs as I had the money 15 hrs after it was purchased.