[Speeddog]

Fork travel on my S4 is 120mm (4.72") according to the owners manual.
I think your fork is the same, travel wise.

Here's a pic of how close the seal gets to the lower bracket when it's fully bottomed out, about a 5mm gap:

 

[Speeddog]

As shown in the pic, that's metal to metal.

I would think that there would be an oil stop, but I didn't see anything that obviously functioned that way when I had 'em apart.
But I wasn't really looking for it either.