If we ignore the physical impracticability of the weapon - which can be hand waved away like the 6-round limitation of a cowboy's revolver, it has decent visuals.
Its well detailed and written, but the story is well travelled. The druidic influence is nice, but it really needed something to pull it away from its very strong inspiration.
Okay, armour created from Ivory is not too far-fetched - lacquered wood and boiled leather both make reasonable armours. I could see alchemists involved in the preparation of the substance but not in the actual construction of the armour.
Apart from Moons comment on Ivory being bone (its not, similar, but different) his comments are spot on.
Items (Equipment Listing) (Non-Magical)