Semi-auto Bren new built receivers?

[bentwrench]

How difficult you ask?

Well not all that bad with moderm CNC machining centers. It is the high number of different operations and total machining time that would make it very expensive. If there was an economical way to make them I would bet someone would have done it by now.

There is good reason why the kit guns get re-welded...

The BAR has a large machined and heat treated reciver and it is much simpler than a BREN, still they cost thousands for Ohio Ordnance Works to make the guns. I own one though, and it is astonishing how well they are made. The 1918A3 is Bob Landies' magnum opus.