(Ilushia @ Mar. 03 2007,11:53)
QUOTE
No. Pylons actually have no melee attack value at all. They can't attack any models which reach base-to-base combat with them. They're immobile and have no way to fight in close combat. They do get Flux Arc shots against those in Fire Fight range, so you want to be a little careful about that. But it's not hard to break, and potentially destroy, the pylon without taking much (if any) damage using teleporting troops.
Though being only 2DC, you can get a maximum of four units against it.
I've done it with a large Genestealer swarm: Declare an engage, 4 Genestealers base the Pylon, and the other four stay 16cm away with the scouts rule. You're already at +1 for out-numbering, even if you do no damage! If there's a Blast marker, you're at +3, before dice are rolled! And the Pylon can do nothing at all against you.