Trussingdoor is pretty kewl. He fires lasers and doesn't afraid of anything.
Posted by: JDYeash937 MkII
Well, John-117 received his on Cairo Station.
Fred-104, Linda-087 and Will-043 all received MkVI around the same time, and used them in a series of operations on Earth and also the Battle of Onyx.
Maria-062 tested a suit of MkVI in the Halo Graphic Novel.
That's 5 we know of having being issued, plus entire spare suits, and a mass of spare parts for them. That, and don't forget, ONI is constantly testing upgrades and role-specific variants, so a number of them would be needed for modification and testing. I'd say around 50-60 in existence, plus spare parts, and some upgrades for the next generation of S3's, although this would only be if they continued to train Spartans, and equipped superior individuals with MJOLNIR, like they did with Noble Team.