See eldoradude’s post 897 for pictures of the gun. Tarrant’s manifesto also had a picture of the black sun on the cover.
The black sun is a satanic symbol which became associated with nazism.
Wikipedia has a picture of it and a history:
https://en.m.wikipedia.org/wiki/Black_Sun_(symbol)
It is gone from Wiki. Thanks for telling me what it is. Podesta is behind this.