The first thing that came to mind when I saw that was, any industry demonstration like that today would have the person dressed out in tactical gear, and not in shirt-and-tie.
Printable View
KL, the gas block on my dissy appears to be significantly closer to the chamber than the carbine in your picture.
This is all starting to sound like an argument about the number of angels that can dance on the head of a pin.
Moving the gas source a couple inches, or less, truly makes that much difference? My personal interest in the dissy was driven by the long sight radius in a carbine length weapon.
Moon
The C8 SFW is a 15.7" barrel and it was designed that way. From what I see most people do not realize that there are 16" carbine systems designed that way.
The C8A3 is also a 15.7" carbine, The Danes have a 15.7" barrel on their rifles as well if I am not mistaken.
If it makes you feel better I have a Midlength BCM with an H buffer with about 4,500 rounds that has never fired a 5.56mm cartridge and only about 200 brass .223 Rem that's never failed to cycle or eject.
I only shoot Wolf or Tula. Only.
My father has had the same experience with less rounds.
ETA: Correction it failed to chamber 2-3 brass cased cartridges with mil spec mags and followers within the first hundred rounds. It released the rounds too early and it would jam them up diagonally towards/beside the gas tube.
Changed to Anti-Tilt Followers and had one stuck steel case since.