It comes packaged with a sling.
The Carry Case is essentially a smaller version of the Door Storage-Transport P.A.K. from 2013, but it is more designed to be slung over one's shoulder rather than to be stored on a door. Similar to the Door Storage-Transport P.A.K., it has two forms: its collapsed form, and its uncollapsed form.
In its uncollapsed form, the Carry Case can store up to fifteen extra darts and six eighteen dart clips. There is also three mesh pouches in the uncollapsed form. The two larger ones can store either three six dart clips or more darts, but anything small enough to fit can be stored securely. The smaller mesh pouch can store only darts, but again, anything small enough to fit can be stored securely.