I picked up a C-Broad Arrow stamped foresite cramp for my No4 about 5 years ago and it has seen A LOT of use ever since. I'd estimate she has been used on 50 or more CNo4Mk1*'s since I purchased it. Its really an important piece of kit if you're into enfields.
Actualy if you get a very SMALL C clamp, and remove the disc from the screw end, and file it flat, it will work. Of course you will have to flip it over if you want to change direction on the sight blade.
I purchased a few tools from this gentleman.
Great quality and service.
Link below:
http://www.canadiangunnutz.com/forum/showthread.php?t=404020



























