There are 4 Airplane Factory (Pty) SLING 4 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 2014 and 2017.
N232RW
2017 Airplane Factory (Pty) Ltd SLING 4
Torrance, CA
N768FR
2015 Airplane Factory (Pty) Ltd SLING 4
Albuquerque, NM
N981RW
2014 Airplane Factory (Pty) Ltd SLING 4
Rio Verde, AZ
N514TR
Airplane Factory (Pty) Ltd SLING 4
Wilmington, DE