The last sprint I can think of was maybe the Rex 45 or Jade M4.
Its really a shame, I think that the clip of the military is fantastic, its placement is ideal for the philosophy behind the design and unlike the generic hourglass spyder-clip, (which is a good clip) the millie clip os designed to match the knife. The irony is that the clip is probably the biggest reason people do not swoon over the military. The liner lock is a clear second.
The change to a 4-way hourglass clip is going to be a game changer for many people and I see the M2 jumping to the top 5 spyderco models. Para 2 and Para 3, Military 2, delica and some other model.