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
Peacekeeper MK2 - Infiltrator Foregrip
Underbarrel
Added in version 1.0.19.0 1.0.19.2
An easy to hold foregrip, optimal for moving and ADS'ing.