Sorry these are a little hurried & may not be so sharp - but people may find them helpful. The SMLE with the G&H type rail is the one I alluded to previously. Sorry I never got round to starting a new thread. It's probably commercial (Warren, Peter, do you have any info on possible military experiments, maybe??), but doesn't the CNo67 sit on it beautifully?!?
Merry Xmas & ATB.