Can a Benelli m4 owner take a measurement for me?

[Lobster_pot]

Can someone measure the bolt pattern on the optic rail for me? Center to center. It would be much appreciated.
I’ve been looking but can’t find the measurements anywhere



Thanks for any help!

 

[Lobster_pot]

Got help from a great cgn’er!!! Thanks man!

 

[Shazam]

I needed the same info. While the bolt patterns are different, it makes the mounting of aftermarket rails/sidesaddles difficult. While the OEM Turkish rail is fine, it could benefit from an extra 6 rounds onboard.

Anyone know of a drop in sidesaddle from turkey that would work?