Arron,
Bipod's for springer's do not work.
It's hard to explain why they do but i shall try and explain,
When you attach a bipod and sight the gun in with a bipod on, the POI is different from when you are not shooting from a bipod,
This is because the gun's recoil is compressed by the bipod.
It is different when you are not shooting without a bipod than say you are leaning on your knee, because your knee does not compress the recoil.
so if you sighted the gun in with a bipod on, the gun would be sighted in when the recoil is compressed. if you folded the bipod up and shot