blowback action where gas blows thru the action and a recoil action
All Benellis (with possible exception to the M4, I don't know about that one) use absolutely no gas to function the action. They are 100% recoil operated, or as they call it "Inertia Driven". Shotguns (and any other platform) that use gas, in any way, function on a gas operated action.
The easiest way to see a big difference. Take 2 newer (not broken in) shotguns, 1 gas operated and 1 recoil (inertia) operated. Fire 1 oz. skeet loads from each. But when shooting the guns, do not shoulder the gun. Shoot from "the hip", and don't grasp the wrist of the buttstock with your trigger hand. A gas operated shotgun will function flawlessly, while a recoil operated shotgun will jam. The recoil operated gun requires that it be shouldered to provide some force for the recoil to push against. With the gun shouldered, The "weakest link" from the pressure pushing against the bolt face, to the ground (where recoil stops) is the action. Without the weapon being shouldered, the weakest link is the force that the gun is recoiling against.
I don't think I've ever seen simples blowbacks that use small caliber relatively low pressure pistol rounds (e.g,, .22 lr, .25ACP, .32 ACP, .380 ACP, etc.) use the gas instead of the recoil to work the action. Could you provide a platform example of one?
I'm not perfectly clear on what you're asking here. If you want gas operated firearms in those cartridges, I can't give you any. Maybe some new design? If you want blowback operated (some of these may actually be a retarded blowback); Ruger Mark I, Mark II, Mark III, Walther PP, PPK, PPK/S, P22, Glocks (yes they make a .380), Baby Brownings, Colt Pocket Pistol, Colt Woodsman, CZ 27, Jennings, Davis. With more time (and a book to help my memory), many more could be named. AFAIK every semi-auto pistol ever designed (and produced) has been a blowback action. There could be a gas operated pistol out there (not counting ARs or AKs as pistols), but I couldn't name even one. As stated elsewhere most of them use some kind of retarded blowback. Meaning that the barrel is locked in place for a split second before it unlocks to allow the slide to move rearward. (.22 lr pistols are the only ones that are not slowed in this manor.
Wyman