Welcome to the Custom Aircraft Builders repository of pre-owned Slings! If you are selling your Sling, contact us. Even if you list your plane on Barnstormers, Trade-A-Plane, Controller, or any other place, will add a link to it here for FREE. We love the Sling community, and like we said, it’s free! So if there’s a Sling aircraft for sale, we want to list it here.