SA-08 20ga rib width

[SFCSNOW]

Sitting at work having fits to order one of the B-Square rib mounted scope rails.  I COULD wait until I get home and just measure mine but where's the fun in that?

Any of you guys know the width of the rib on the SA-08 20ga?  I'm finding conflicting info online.  Some say 7mm and some 3/8s.

[stinkpickle]

I don't know, but the rib mount has a set screw you can adjust if the rib is too narrow.