I know it's made in China. I know that Holosun is made in China. I know a lot of people don't like Botach for this reason or that reason. I'm not looking for the sanctimonious tripe regarding me purchasing Chinese items; we have ALL purchased and owned Chinese stuff, whether it's the Norinco AK or SKS, or the box of crayons and coloring book purchased from Wal-Mart.
Also, I do know ScalarWorks has a couple Benelli M4 mounts that are more than twice the cost, but not this same design. I bought this one because it was advertised to work with Holosun's, which I have - and like the design of this one with the half-rail. The cost was attractive as well and I don't mind ordering from Botach.
That said, moving on to the actual question and issue I asked about; I'm guessing that this will only work with the Holosun red dots that don't use the battery tray under the optic since that raises the height a bit... and even in the best situation, with the most low profile mount and low profile optic, it's still lower than a lower 1/3 cowitness based on the pics on Scalarworks site of the view in those instances.
So perhaps the real answer is that a functional cowitness on a Benelli M4 hasn't been designed yet, and maybe there's a reason for that. I guess most just put it on the factory rail and don't worry about cowitness. I may just have to do that.