When you have a fortified position which you absolutely, resolutely need to get through, then choose the Hades Breaching Drill.
It does what it says on the tin!
This is the excellent new Death Korps of Krieg Hades Breaching Drill.
Just the thing to take out that fortified Ork stronghold that I have (not) been building.
Really nice model, nice to see something different. Now if we could see more innovative Ork stuff and slightly less Imperial Guard I think I would be happier!
Thanks to BoLS for heads up.