yes they are war machines so onoly in 2000+ as a sepperate attachment... but they really aren't worth their points. IIRC it is like 150pts give it 2 structure points and an armoured top with two twin-linked big shootas... sure you can upgrade those to zapz or kannonz for 15pts but that is like 300 points (give or take) for a relatively fragile vehicle... just stick with the battlewagon and upgrade your Nobz or get more boyz...you can never have to many boyz