Just an aside to anyone interested and to hijack my own thread: the first year "short tube" variants of the Diana 34 series guns had the same 28X77 B&S measurements as the FWB 124. Perhaps they thought that was a good starting point. The early Dianas however, didn't make the same power. I think maybe it had to do with their transfer port which was long, bent, and quite large in diameter. That being said, one of these detuned to 10.5fpe is VERY pleasant.