I noticed something about the item raws a few days ago. There are inconsistencies with some of the armour for different slots in terms of armour level. Also, the armour levels described in the manual are all incorrect (or the raws are), and two "plate" items are missing from the raws.
Check out item_gloves.txt. Gloves (ie leather) have ARMORLEVEL 1, Gauntlets (ie metal) have AL 2, and Plate Gauntlets also have AL 2.
Gloves are inconsistent with boots and helm slots where the leather/clothing equivalent have no/zero AL, the metal equivalent has AL1, and the plate equivalent has AL2. Chest pieces start zero AL for clothing, AL1 for (leather) armour, AL2 for (metal) mail, and AL3 for breastplates and plate armours, while legs only have AL for leather/chain leggings (AL1) and greaves (AL3). Full Plate suffers a down-grade in comparison to breastplates (half plate) or plate armour, having only AL2 which makes little sense, and has a smaller MATERIAL_SIZE compared to Plate Armor despite its larger LAYER_SIZE.
The manual suggests AL3 for all "Plate___" pieces and breastplates, AL2 for all regular metal pieces and chain shirts, AL1 for leather armour, and AL0 for all other cloth or leather pieces.
Shoes, Gloves, Torso all have a "Plate___" equivalent, but there's no Platehelm or Plategreaves at all in item_helms.txt or item_pants.txt files, despite them being listed in the manual.
These raws haven't changed since at least MDF v1.02 (42.06). I first saw the manual introduced in v1.05 and the items listed haven't changed.
Also, mostly unrelated and arguably not buggy or inconsistent, Orcs are able to make lamellar armour sets including chest, greaves, helm, gaunts, high boots, and also able to craft robes, cloaks and masks out of lamellar. Robes and cloaks can be used with other armour, but masks are completely useless as they'll block any helm or cap due to being SHAPED. So in my reaction_orcfort.txt I change the lamellar masks to ITEM_HELM:ITEM_HELM_VEIL_FACE. I think orcs could probably sly in (cheat with) two face veils under a helm without adjusting the sizing, while making masks not SHAPED still doesn't allow them to be used with caps at current size, but one way or another I'd like to see this tweaked permanently in the raws.
Edit - clarified some grammar/language.