RIA has a rifle that states STO Marked Falling Block Single Shot Rifle. Also states manufactured late 1990's. Does anyone know what action this is and any history. Is it worth owning? V. Sigman put a barrel on it in 2023. Does anyone know if Verl is still with us and if so how I might contact him. I have a Ballard that he barreled also. The subject rifle is from the Clark Ehlers Collection. It appears Clark had a very large collection of single shot rifles. RIA has been offering them for several months now.