What is this (neo-Nazi?) symbol?

What does this partial swastika mean?

A series of stickers on a car's rear window: a black maple leaf on a white background in a black circle; a swastika missing an arm; an oval sticker reading \".223\"

Saw a bunch of stickers on the rear window of a car. Came off generally as pretty Nazi-coded with a Punisher symbol and an SS emblem reading "Gott mitt uns" (not shown) as well as these stickers: one reading ".223" (common firearm calibre"), one with a black and white maple leaf, and one a swastika…but crossed out, and missing an arm. What does this weird, partial swastika mean? From context, I expect something bigoted and nasty, but I've never seen this version before.