(Cosmetic) Militarum Tactical Backpack Has Wonky Physics

Issue Description:
The Militarum Tactical Backpack has very floaty physics that causes it to go practically perpendicular with the player character. Tested on the Grunwald Variant Pattern, but not the Catachan Pattern.

Supporting Evidence:

eric, are the backpacks done?
no hagen just the physics left.
arg just copy the cape physics we need them now…