The gas operated conversions previously posted have either reduced the hammer spring or the radial degrees of lockup.
I'm trying to find the source of the energy, or the efficiencies in your design allowing the avoidance of the above.
I see how the rear throw only has to be far enough for the hammer to catch the disconnector. The lightened carrier will move quickly. Is the gas tube round without ribs -- it looks like more than the length is different in the piston?
What really looks good, with the trunnion in the same place and gas operated, is the fit at the trunnion. It appears the geometry for the rear fcg is unchanged and you've avoided the chopped bolt and carrier -- reassuring concerning out of battery and slamfires.
I'm playing with one that is not yet operational. Thank you, this is very helpful.