A recurrent “theme” (read: whine) I’ve had about BUL handguns is that the magazine and parts situation is somewhat dire, especially on the 9mm side. On a tip, I did find someone who stocks BUL M-5 magazines and parts. Ask for Lou at All America Sales (870-544-2809). He was able to source some stuff for me that I had a lot of difficulty finding otherwise, and his prices were quite reasonable (to the point where I was wondering if he wasn’t getting out of sourcing these parts to begin with).
I am in the process of upgrading my M-5 using those parts, and should have an article on that process soon.