Going by general mmo standard, this must be a 50AC / DT metal armor. :p
First version was right!
If you want to make enemies, try to change something.
Do you mean that untextured part below the big shoulder plate? That does not seem to be visible in the game, maybe because the lower plates are rigged 50% to the upper arm, and 50% to the shoulder, so when you turn the arm 90°, the plates turn 45°. Check the picture in the first post.
Awesome. I always believed in you Can you do the same with MA and PA lower shoulders, please? The design was in it.