A true period 43 glider gun was discovered by Nico Brown on September 11, 2022. It uses the same honey farm + fishhook → glider reaction that many other glider guns do. It was originally found in a form using a block and eater instead of the shillelagh on wing, but the block got turned into a pond rather than actually being restored, so Bellman was used to complete it.
This is the only known period-43 gun, and oscillators based on this gun were the only known period-43 oscillators that don't use the Snark before the discovery of the p43 pi-heptomino hassler in November 2022. Prior to that, the 80-cell form of the gun capped with fishhooks was also the smallest known period-43 oscillator by population.
When the gun was discovered, it was tied for the seventh smallest by bounding box.
A 30-glider synthesis of the gun was found early the next day.