Versions:

• Construct's Armory: 1.12.2-1.0.2
• Tinkers' Construct: 1.12.2-2.10.1.87
• Mantle: 1.12-1.3.2.24
• Forge: 14.23.4.2756

Observed Behavior:

Armor doesn't work properly on non-player entities.

Expected Behavior:

The opposite.

Steps to Reproduce:

1. Give a Zombie or skeleton some armor
2. Attack it to show that traits like rough do not work
3. Additionally, giving it to a zombie shows that the shoulders and gloves are rendered incorrectly:
   

The armor is not supposed to work on non-player entities. This is not really by design per say. Very early on in development, I remember changing all of the conditions from EntityLivingBase to EntityPlayer. I really wish I could remember why I did that so I can review whether or not it's actually necessary. As for a resolution, I'll try and see if I can figure something out.

In addition, I'll look into the shoulders and glove rendering bit. That probably shouldn't be happening.