Oh well, back to the drawing board.

http://world.guns.ru/assault/as07-e.htm

…you will find that there are only 2 or 3 more parts than a standard AK, and field stripping is just as easily done.

Aslo, nowhere in this article were the words “Recoiless” or “Recoil Free”. The counter-mass’ only purpose is to dampen the blow-back of the bolt-carrier, and to keep the muzzle down as a result of the force vector from the recoil spring and shoulder collisions. To sum it all up, the only collision that is canceled in the entire mechanical operation is the recoil-spring and shoulder. The explosive force of the cartridge is the only felt recoil of the weapon, which is actually less force that the recoil spring using the receiver and your shoulder as a backstop in order to return forward.

Also the force vector from the explosion is exactly perpendicular to your shoulder as you fire the weapon. The force vector of the recoil-spring is actually offset above your shoulder which is ultimately what causes the muzzle to climb. So it should be clear to anyone that just the reduction/cancellation of the recoil-spring’s force alone, is enough to improve a weapons accuracy incredibly.

The AK107/108 has an extra piston, spring, and a wheel from the looks of the animation. That’s three extra moving parts that can fail. It add unneeded weight and complexity for what? Lower muzzle climb and better accuracy? You can do it with a free floating handguard and a good muzzle break.

The AK 107/108 like the AN-94 isn’t going anywhere.

AR15 accuracy:
http://www.ar15.com/forums/topic.html?b=3&f=118&t=414599&sr=0

How the Piston in your DI AR works
http://www.ar15.com/forums/topic.html?b=2&f=130&t=165511

Yes their is still going to be a recoil force back but Netwon’s 3rd still applies the forward force of the counter weight which is timed to counter the recoil at the same time reducing the resultant rearward force of the recoil impluse.

Just because the counter-mass/gas-piston is synchronized with the bolt-carrier/gas-piston doesn’t mean the counter-mass is equal to the bolt-carrier. Perhaps the gas-port for the counter-mass is much larger (and operating spring much stiffer) than that for the bolt-carrier. There might be much more momentum in the counter-mass than in the bolt-carrier.

But even if the AK-107 functions as advertised the tactical concept of hand-held full-auto fire for every infantryman seems like an idea whose time has come and gone. A mixed squad combining accurate semi-automatic fire provided by well trained infantry using accurate rifles with optical sights plus volume fire from a dedicated squad-automatic weapon seems like the wave of the future now.

Which doesn’t mean that this design can’t be ergonomically more friendly than the original (beyond improving on the problem of the moving piston), just that it can’t negate Newton’s Third Law.

But get that reduced recoil going straight back with the counter weight at the end of the barrel and you have a chance of keeping the sights on target.

No I haven’t shot one, maybe they are recoil free. This is just a physics inquiry for those who may know a lot more about what goes on under the hoo…err… furniture in this rifle than is apparent by the animation up there.