Bren Receiver Internal Differences.

Bren Receiver Internal Differences.

I’m trying to understand the internal receiver differences the between the various Bren versions. For instance I know the L4 versions had the mag well opened up a bit. But what other difference are there? Are the Mk1 to Mk3 insides all the same?

Thanks
Mark

So far as makes no discernable difference, then they're all pretty well identical. Some internal machinings were deleted or just simplified between the early Mk1 and later Mk1 (we call it the Mk1A) and the Mk2

Thank you Peter.