What's this symbol used by the Nazis?


I'm on episode 5 of Black Lagoon, and I noticed this symbol being used by the
Nazis on a flag and on a red arm band worn by one of the leaders of the group.

![enter image description here](https://i.stack.imgur.com/1G8Ee.png)

![enter image description here](https://i.stack.imgur.com/rfNQw.png)

What's this symbol called, assuming it corresponds to something in real life?
Is there any reason this should be used over a more recognisable symbol like
the swastika? It doesn't correspond to anything listed on [the Wikipedia page
for Nazi symbolism](http://en.wikipedia.org/wiki/Nazi_symbolism).

EDIT: In response to the idea that it might have been censorship specific to
Funimation, I decided to look up the episode on a Chinese streaming site I
use. The symbol there was identical to the one in the Funimation episode. Of
course, this doesn't mean that there couldn't have been censorship on the
Chinese end as well.




This is the symbol of the
[Sturmabteilung](http://en.wikipedia.org/wiki/Sturmabteilung), a paramilitary
organization within the German Nazi Party, whose methods of violent
intimidation played a key role in Adolf Hitler's rise to power.

It's made up of an "S" (in lightning bolt shape) and an "A" and is probably a
reference to Neo-Nazi groups evading the Swastika ban by using other related
symbols.

![SA logo](https://i.stack.imgur.com/Jukxn.png)




This is the symbol of the
[Sturmabteilung](http://en.wikipedia.org/wiki/Sturmabteilung), a paramilitary
organization within the German Nazi Party, whose methods of violent
intimidation played a key role in Adolf Hitler's rise to power.

It's made up of an "S" (in lightning bolt shape) and an "A" and is probably a
reference to Neo-Nazi groups evading the Swastika ban by using other related
symbols.

![SA logo](https://i.stack.imgur.com/Jukxn.png)

