TheCustomLime wrote:Mk. 4, 3 or 2 power armor. Mk. 7 power armor wouldn't have been issued to the Space Wolves right away as they weren't on Terra during the siege and I don't believe they would have had much access to Mk. 6.
The Space Wolves didn't make to Terra during the siege, but they did make to Terra. The Bill King story put them at mere hours away when Horus lowered his shields, the revised version in Collected Visions
IIRC didn't give a timeframe but still indicated they were close enough to be considered (even if Horus wasn't bothered by their threat). That means they'd have had access to Mk6 & 7 for seven years before the 2nd Founding took place even if they weren't at the top of the requisition priority list, which in fact they probably would have been as being among the first reinforcements to arrive they would have been Terra's first line of defense against a second traitor attack, and at the forefront of the early days of the Scouring.
The official fluff from the WD129/
RT Compilation article was that when the 2nd Founding took place the armours available were 'mostly mk6 & 7 with a smattering of older types'