The NSN make-up is quite strict and the nationality designator, such as 99 or 13 or 21 or 12 etc indicates Country of origin. This would indicate that the origin of the Canadian barrel and box is Canadaicon.

However, errors have occurred, especially with nations that possessed 7.62 and .303 Brens....., who would put their own originator country by the part.

The L12 sub cal kit boxes were VERY hard to acquire and never available as a spare part. As I mentioned earlier,in the UKicon, the only way one would be available was when the barrel bulged into and stayed in the rifle.

Good thread and loads of useful info is coming out here. Maybe it should be put into the FAL forum.

Talking of which, there is a .22" Imbel FAL, based on the FN but manufactured as a .22" rifle. Do any of the internal parts or magazines interchange with the L12 sub-calibre kit?