My photo server site is doing an upgrade, it should be back up soon.
This is just a prototype mount, no production time frame as of yet…but it will be a separate purchase, the standard mount will still be packaged with the M4s.
this mount might also extend to M3 mounts in the future…
This is a very nice mount since the mount is spring loaded and it is free folating, it really locks up very securely with damage to rail or any parts possibly failing…