They do sit very low, but this feature is only really realised with the likes of the HW100 etc where the mag sits in the action rather than on top of it, otherwise they are a bit higher, but not hugely.
I have a 40mm version (one of the prototypes) on my HW100, and I astill have a good eye position with a bridging piece under the objective (between front and rear parts of the action).
I will have to use slightly higher mounts on my production version as it is going on the 410k, where the mag sits quite high.
I like a low scope as it gives better cheek weld and balance, I have just changed the scope on my huntsman from a 25 to 30mm tube and have had to go single shot...the mounts just wont accept the mag without a half inch gap under the objective...not nice, still, I dont hunt with it a lot so not a biggie
Great little scopes though eh, great for picking tree rats out in the gloom...even if I do then miss the twig in the way...ah well
Superb low light as well, and the IR with the AMD ret is really precise.
One thing I have found is that it pays to focus the eyebell on a distant object rather than the sky and ret.
I thought one of mine would not focus down close enough, but I think this was the problem. I was reading a sign on a house some way off that I could just see with the naked eye as a blob, very sharp when the eye bell was corrected a bit.