While a big objective lens on a rifle forces use of high rings, that then make a good cheek weld harder to hold.

But on a crossbow? This isn't a issue, the large objective lens has tons of room as it's extended out forward of the arrow retainer/trigger area housing that it's mounted on.

Which also brings up the point that ANY rifle scope that can be ordered with custom elevation turret will work well on a crossbow if you don't desire the made for crossbow type reticule.

Problem is those scopes that you can get custom turrets for also tend to have a bit higher cost to them as well...though you might be able to get a custom turret for the Crossbones as it's listed as having custom shop available for it.

I hope we'll see some new & better crossbow scopes in future, but the scope companies so far don't seem to be in much of a hurry about it.