Just played and finished the latest mission with the Trygon and since Heavy has access to the Heavy bolt rifle I put it on just to see the tubes that are used for the heavy bolter to still be attached to my back, furthermore the heavy holds the heavy bolt rifle like the heavy bolter which was not the case when i played on the test server i think AND sometimes the tubes can just disappear when using the heavy bolter. Also Some weapon variants dont have a blank version anymore which I thought was because of the added scopes to some of the weapons but starting at artificer tier, certain weapon variants(new scoped ones included) do not have blank version anymore. for the tubes on heavy there is a "fix" by swapping weapon loadout at a weapon drop to the multi melta and then to the heavy bolt rifle the tubes completely disappear and switching back to heavy bolter puts them back(Image 1)