Attachments have changed greatly in Season 13 and need to be manually redone on the site. This will take quite some time, so apologies if this section isn't helpful right now.
Attachment Details
Hades - OWC Light Suppressor
Muzzle
Added in version 1.0.26.0 1.0.26.25
Suppressor made by OWC. Increases flexibility at the cost of range.