I see 2 different Exo-M models advertised, one with a near 3" blade and one just about 4". So not really sure about the accuracy of the specs, or maybe there's more than one size being released and the smaller of the two stated it was an exclusive... I won't mention the dealers.
I do like the lock and the one key component that kept me away from the original, no pocket clip. This one goes on my list.