That's tiny!
I hate to do this but...
THAT'S WHAT SHE SAID!
How many times are we going to have to hear that one?
The only ones I can find are at max 2", and what I want to know about this is
WHERE THE HELL CAN YOU FIND FIVE INCH RAILS??! That is 'effing huge man. I just can't imagine possibly handling something that thick.
Yes, I made that sound dirty intentionally...