Found out by Gwennifer
The Patriot is missing the track links both visually and on the collision model, which adds 13mm of turret armor to the left side of it; where the loader sits.
The left side of the turret is very sloped anyway, so it’s not going to make a difference. 89 vs 102mm on the thin layer of the turret side.
MeatheadMilitia from WGNA replied:
We’re aware of this and we’ll have more information on this in the future.