The weapon platform can be fitted with a laser type of weapon, but the accessory sprue will let you add different weapons - cannons, gatling cannon and rocket launcher, as well as let you make a closed compartment platform.
Assembly is rather straight forward with just a few mould-lines. Unfortunately the tracks have some rather annoying mould-lines which takes quite some time to get rid off. The quality of the plastic is excellent without bends or any other problems.
You can make quite a lot of different weapon types from the bits, and the ones I needed the most was the laser and multi barrelled cannon. You also have the option of adding the "top" to the fuselage, and place the weapons on top of that. Personally I like the platform without the top the best.
All in all I think these are a great find, and hope to get some time to paint them soon, as one always need artillery when playing those pesky CSM. Now on to some priests to tend to them......................
And for completion, the heavy weapons sprues - haven't build anything yet from them but this is how they look. Not sure what I'll use them for yet, perhaps just parts.