Durability of aircraft to MG (< 8mm) guns

[Romanator21]

I think the argument is whether or not the bullets will still have enough energy to do any significant damage to all those parts.

According to Winny, they may not.

However, I know nothing about ballistics, and I will not insert my opinion in this matter.

However, I do wonder if maybe fuel tanks are "too easy" to light on fire, as shown in the leaked Beta footage and others. Even though some rounds are incendiary, it isn't necessarily guaranteed. The round has to pass through a point where fuel is vaporized, such as a leak. The probability of that is low unless hitting at convergence I imagine.

PS - I just noticed that He-111 has two crosses on each wing. Interesting.