F-Class model shank size

[kevwil]

I sincerely apologize. I'm sure this question is beating a dead horse, but I searched and didn't see a definitive answer. What is the shank size on the Model 12 F-Class rifle, such as SKU 18155?

I sure wish they would list the barrel shank size and the action screw spacing on the website.

[Robinhood]

Large. It is a single feed target action. That is the first clue. Then the shorter barrel nut is the second clue.

[kevwil]

Thanks!