Heya BiA
Yeah I knew the British Squaddies called the L1A1 the SLR, I don't think the Brits ever issued the L2 to their army although I'm hoping some of the British forum members can confirm/deny that.
As for the L4 Bren, I think it was mostly the Royal Marine Commandos that used it (because it was capable of operating in extremely low temperatures) and again I'm hoping that the British members here can confirm/deny if if was ever used by the British Army as an infantry weapon (and not just as vehicle armament).
I've seen pics of South Africans using R1 (their home built version of the FAL) 20-rd mags in their 7.62mm Brens somewhere but I can't recall the source. However having a quick search of net gave the following page from 2008 which shows a South African Bren with a 20-rd FAL mag plus another with a 30-rd Rhodesian FAL mag
http://weaponsonline.proboards.com/thread/993
I believe the Canadian C2 uses a completely different rear sight to the L2, a "dial" style whereas the L2 uses a leaf rearsight. And something else about L4 Brens in Aussie service, I vaguely recall that we were advised to only load the L4 mags to 28-rds whereas the L2 mag was okay with being loaded to 30-rds.
I haven't had any experience with civilian semi-auto FAL types so your personal knowledge is both interesting and welcome
