BSA rear sights

[trajectory]

Thanks for your replies, BA sounds a good possibility.
I think the material they made them from was a polymer, rather than an alloy, but yes they do seem to break across there,

Cheers

[abellringer]

Just stripped a sight, it is indeed 6BA, part of the 'body seems to have a slight ''indication'' of a thread, but the thread actually works on the small nylon peg pushed into the body. Hope this helps.
ATVB
abellringer

[trajectory]

Ok, thanks, that's a great help confirming the thread size. That must be quite a resilliant little pin to take the thread, but then perhaps once the windage was set it wasn't usually moved much...not sure, but anyhow thanks for your help,
cheers