Thanks Geezer. I have seen iron sights on an early version reviewed in AGW before formal release but to date haven't been able to confirm whether any were offered for sale with open sights.
That's interesting and would explain why ones with iron sights have been seen but seemingly not been offered in the UK.
The tapering seems to have been more prevalent on high power versions as the cylinder walls didn't cope too well at high power.
Cheers Dave. I've started getting some further technical/servicing info together.
In regard to snippets from other members on this and other forums, I do add the info where I can substantiate it.
Thanks Steve.