Looking at current state of FSD, it'll probably end up shooting itself.
Better still than shooting other friendlies. That being said, one has to start somewhere.
A looped barrel that aims straight at the threads. The tank equivalent of a footgun. Aka TurretLoop, now for $420 at your nearest Tesla dealer, pre-orders only while stocks don't last.
The "footgun" barrel would be an excellent image for a editorial cartoon about Elan.
OTOH, making light of the all-too-real issue of friendly fire can go over poorly with older folks, those who've served, and those who've lost family members.