While Force Demolisher counting as a Simple Melee weapon doesn't say it's magical per se, the description of Armorer Subclass refers to you craft magic armor so it's unclear, especially since you turn it into Arcane Armor. as Magic action.
Those are both irrelevant. You create mundane objects as a Magic action with Tinker's Magic and the Armorer has class features specifically related to creating or crafting magic armor: Tools of the Trade and Armor Replication of Improved Armorer. Those two are the only features of the subclass dealing with magic armor. Nothing else does. The Arcane Armor acts as a Spellcasting Focus, but Spellcasting Foci are not magical unless stated to be so, just like any other item.
I'll concede to you, not because you turn it into an Arcane Armor as an Magic action which can be used as a Spellcasting Focus that it inherently make it magic.
Bottom line is that Force Demolisher doesn't explicitly states its an effect that is magical.
I am confused but I agree. Now I am not sure if you were arguing that it was magic or not. I was always of the stance that it was not.
I am confused but I agree. Now I am not sure if you were arguing that it was magic or not. I was always of the stance that it was not.
How to add Tooltips.
My houserulings.