Torian,
SO you have a "Bren 10" that actually works?
Just teasing. Closest I ever got to owning a BREN was at a shot show where they handed me one of their guns and it cut the begeebers out of me. Wsa sure for a moment they were going to give me one to shut me up.
When I imported a CZ75 into the country in 1982 I was "special" and a bit later the Italian guns came out. A fried dashed out and bought one and we found that slide group from my pistol would fit his and magazines inter changed. I would not fire either gun with mixed parts other than magazines though. At the time the CZ was still worth $1400 in mid 1980's dollars and if memory serves the first TZs were around $200. I have often withed I had sold my CZ and relaced it with a couple of TZs and a Python but there is no going back
-kBob