Weapons destroyed

I was fighting my friend using his chaos space marines of nurgle allied with some Imperial Guard. I deep struck my ravager right beside his leman russ and unleashed all 3 dark lances on the side armor. 2 of the shots hit and one hit but did no damage. I rolled 2 penetrating hits. One shot did a stunned and one was a weapon destroyed. He claimed that he could count the smoke launchers as a weapon destroyed but my claim was that to be a weapons the war-gear has to do some kind of damage of a sort. Who would have a viable point? We play lenient rules but it is a leman russ and it had killed 10 kabalites in one shot so voice your opinions please on if should count as a weapon and be destroyed or not.

I would say its definitely not a weapon, would be like us taking the night shields or Flickerfield off a ravager instead of a dark lance he would definitely not let you do that!

I actually used the same example as crazy ivan with the flicker field. He was trying to fight the argument saying that my chain snares or something like that wouldn't be a weapon either but they inflict direct damage as I fly over an enemy grouping.

What is the profile of this "weapon" that your opponent would like to be destroyed? Oh right, it doesn't have one. That's because it's not a weapon.