Well...yes...yes it is.
From what I've seen, if you want a bipod on a break barrel, you attach it to the barrel. This seems somewhat contradictory to me, however. The object of a bipod is increased stability and therefore increased accuracy. However, I had it in my mind that having anything touch the barrel, let alone attaching something to it, would adversely affect accuracy (hence the fact that any military rifle is free-floated). Does this principle apply only to firearms? Just speaking from personal experience here, but when I rest the barrel on a hard surface (or really, any surface at all) my shots are thrown way off.
Just in case it's important, I'm shooting the Hunter Elite, which is a droop barrel with barrel shroud.
Thanks for the info...
---Nick