Frontal View
Frontally the Object 263 has very intimidating armor in the grand scheme of things. The upper frontal glacis(UFG) and most of the superstructure(Areas #1-#4) are primarily immune to most shells that are coming towards the Object 263. However, the lower frontal glacis(LFG) is very weak as well as the small strips surrounding the gun mantlet. The flat piece below the gun is also 250mm thick but due to it not being angled can be penetrated by most tier 10 tanks if you are caught in a pinch.
Side View
Here is where the “all or nothing” armor scheme turns into being a negative for an Object 263 driver as you can see with all of the green areas. The strips of red are the thick frontal armor plates being taken into account for on the side armor which isn’t done on all tanks. There is also a thin strip of angled armor(LSH #4) that is small but tough so make sure to aim higher on the side to avoid hitting that or simply hitting tracks.
Rear View
Nothing special to see here on the rear of the Object 263 since it’s armor is weak all over. If you are firing down into the Object 263 into the open compartment make sure not to hit the gun and/or thick frontal armor since it can sometimes give some very weird penetration numbers/zero damage hits. 
