Resolved: Vent Rib Width

[TWO2SEVEN]

I am looking at adding a snap on fiber optic sight to my 88. It has the 28" vent rib barrel. I am at work, so I can't measure the rib width right now. Does anyone happen to know it?

Thank you!

 

[TWO2SEVEN]

3/8" for anyone else who needs to know.