Citation de Haporal
https://en.wikipedia.org/wiki/AK-107

"The AK-107, AK-108, and AK-109 represent a significant change to the Kalashnikov operating system originally designed in the late 1940s. This system uses a recoil-reducing countermass mechanism with two operating rods that move in opposite directions, thereby providing "balance". One operating rod, the upper, has a gas piston facing forward while the lower also has a gas piston. The gas tube at the forward end of the handguard is double-ended to accommodate the two rods. The enlarged gas tube cover of the upper handguard guides both rods in their travel.
When the rifle is fired, gas is tapped from the gas port to enter the gas tube, driving the bolt carrier to the rear and the counter-recoil upper rail forward. The critical timing of the reciprocating parts is accomplished by a star-shaped sprocket that links and synchronizes both components, causing both to reach their maximum extension, or null point where forces are exactly equal, at exactly the same instant. The felt recoil is therefore eliminated, enhancing accuracy and assisting control during fully automatic fire. "

après 70 ans ils réalisent qu'ils peuvent améliorer les kalash

putain ces enculés de russes, tant que ça marche ils changent jamais rien