I am also quite interested in this kind of thing... preferably something propane fed, not C02 though.
I think it would be great to have more gas blowback rifles and I've been searching for something like that that would be fairly usable for quite some time now.
In my opinion, gas filled magazines would be prefered, but I would also like the option of external air. Or propane for that matter.
...now make me one of those AKS-74U...preferably heavy blowback and fully automatic please...and metal / wood of cource.
That'd be something I'd drop alot for... $1000 or less would be prefered, but it's a sweet spot!
Too bad those new Escort gearboxes are semi auto for now, and v2, is it not?
Worst of all, they run off those stupid little C02 cartriges. Maybe a AK full stock full of gas would be nice