I've had a fair few comments about these chaps. Mostly because of their conversion. As I've said elsewhere, they are made using the Vulcan Megabolter from the Shadowsword kit, fashioned crudely onto the weapon mount of a Razorback which sits on the Razorback back plate attached to the rear platform. It's is an amazingly simple conversion made impressive largely by the overall look (and awkwardness of accessing the bits!)
These guys are pretty much ready to fill the skies with deadly ammo.