What offset RMR mounts does the military use?

[tacticalcity]

You can pretty much find a thousand discussions about what optics, rifles, stocks, sights are issued and by which brand of service right down to the specific unit. But I have never been able to find out what offset RMR mount is being used by various units on their scoped rifles. Sure, when it is on top of an ACOG that's pretty simple. But I mean what mount is being used when it is mounted on the rail or receiver at a 45?

Why am I asking? 75% curiosity. 75% getting my clone on. Got a URGI and just wondering what the "proper" mount is. If it turns out to be something that sucks I'll just use what I've got. Might do that even if it is awesome. But curiosity has the best of me.