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
Crossbow - 28 Bowstring
Bowstring
Added in version 1.0.26.0 1.0.26.29
Heavy bowstring with high tension. Bolt speed is slightly increased at the cost of accuracy.