Thanks Peter, but you can relax, I wasn't after an online armourers course, it's not a job I'd remotely think to tackle myself in the back yard. Sorry if I've miss phrased my question, I guess what I was more interested in was why? Your statement was that "There's a lot more to it with the Bren/L4" Is it because it's a rimmed case? The higher pressure of the 7.62Nato Cartridge? An advent of the modifications applied in the conversion process? All of the above? If it's all to technical and can't really be summarised fair enough. I was just interested?

Daniel

---------- Post added at 08:51 AM ---------- Previous post was at 08:47 AM ----------

Oops! Re my last post. Before I get my nuckles whacked, I did of course mean "Rimless case", (7.62) my bad.

Daniel