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.





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.

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,  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.