Semi Auto Bren extract problem

[Sentryduty]

Also worth remembering here is that the piston MUST articulate on the piston extension. It is made this way. There MUST be some movement between the two.

This still holds true with the FN MAG 58/C6/M240B series even today, curiously the FN Minimi/C9/M249 uses a totally rigid piston and somewhat sloppy fit in the sheetmetal gastube.