Yeah, it isn't too far off the mark. A few vids of an M163 style vulcan, and a Naval CIWS (hihgher ROF)
Note on the first, you can hear a near identical sound to that ingame. The clangy bit is from being within the warehouse.
http://www.youtube.com/watch?v=CRlIXWfwnok
http://www.youtube.com/watch?v=HeXdr...elated&search=