[2020] Why did they make a whole event to bring back old stuff if they only bring back 3 things?

Originally posted by Blueberries: it makes no sense instead of bringing back old stuff they make new things in the old event? what is that?

The team is aware that some attachments from the Legacy era of Siege haven't carried over to this mini-event. The team will be taking the feedback and making sure to adjust in the future if the mode is ever released again.