There can't be that many people left in Bulgaria. They're all begging in Oxford if you care to visit, especially now summer is near. According to the Court Reports in the local papers, they do seem to be doing a fair bit of 'self-help' or helping themselves too. And anyway....., what is this thread doing in the other SMG's category. Shouldn't it be under the Bren forum.
I haven't seen a Bulgarian mag loader but couldn't it be made to fit and operate on a Bren mag? We certainly fitted UK made Bren mags to the trials ZB .303 Brens and had them running