OK, this seams a bit far fetched, I can See maybe a few rounds hitting the gun barel and damaging it, the MG gun barel, the Coax gun barel does not realy penatrat the gun mantel on the Panzer, so hitting it would be a 1000 to one shot.
The MA on the Panzer 4 is being damaged how by MG fire?
The tiny apature for the gun sight ( like 1 inch big) is taking a direct hit? and going into the tank? You mean like that sean in that Sniper movie whear the bulit goes through the scope and into his eye?
In the pictures of German tank turets aranged around the inside of the turet( and the rest of the tank) are clips and boxes containg spare Vishion blocks( perescopes) and I beleave their are extrar sights for the bow and MA gun's.
Hortland what of the rear armor facing have you done test on that?
During MA engagements I have taken out Tank engines with the MG 34, how is this posable?
Also what of the imobalazation issue by MG fire?