Something is wrong with the diameter. It says 2.18 inches, which is the same as 55.372 inches. And I think the Frantic is supposed to be approximetly 50.50 mm which is equivalent (cool word) to 1.9881889763779528 (1.99) inches.
Yeah. I remembered seeing that and thought I had it wrong but just now I remembered that it was supposed to be the same dimensions as the Catch 22 which was just a little bit wider than the M1 but very similar diameter. Typo I guess.