Weapons and Armors are easy to change. Here is an example of a simpler armor table.
Armor: Armor Class
Light Armor
Padded: 11 + Dex
Leather: 12 + Dex
Medium Armor
Chain: 13 + Dex (max 4)
Scale: 14 + Dex (max 3)
Plate: 15 + Dex (max 2)
Heavy Armor
Full Chain: 16
Full Scale: 17
Full Plate: 18
Special Materials
Hide: 13 + Dex (max 2). Heavy fur, thick leather, bone, etc., effective but bulky.
Dragon: 15 + Dex (max 2). Shed dragonskin, sometimes gift from dragon.
Note
Scale armor includes many varieties of torso armor that comprises small metal plates connecting together, including fishscale squamata sewn onto a fabric shirt, brigandine cuirass riveted between fabric, banded lorica fastened to leather straps, lamellar strung together, and so on. Full scale armor sometimes has long thin metal splints as limb guards, and sometimes is a brigandine worn over full chain.