[Radoye]

Btw: U can understand my english?

Yeah, no problem. It's not perfect but it can be understood.

Your English is probably much better than if i would try your native language

Regarding Sturmbocks:

There were 3 versions:

R2 - substituting 2 wing 20mm cannons for 30mm, and with added armor around the cockpit - 256kg total (this includes the 138kg that all A8's carried as standard).
R7 - carrying standard armament (4x20mm, 2x13mm) but even more heavily armored - 337kg total armor; this version still carried the bomb rack and could also be used for ground support
R8 - same 337kg armor as R7 but with 30mm guns replacing 2 of the 20's like in R2; but it was too heavy so to save weight this version had the cowl machine guns removed.

Schematics of the added armor:

R2 only had this:


R8 also added this:


In this model you can clearly see the externally added armor plating around the cockpit: