Short gas system solution?

[P0WERWAGON]

upper features a unique secondary micro gas block that diverts gas early into a standard gas tube with a second hole. Gas diverted forward enters an expansion chamber, created by forward portion of the gas tube, making initial unlock “softer”

gimmick or not?

 

[KevinB]

IIRC this was one of Kino Davis's systems designed to increase dwell time.

No experience with it -- but that man is a genius.

 

[Deckard]

Dlask has made something like this and adjustable.