På denna sida hittade jag lite information om den ryska vapenkonstruktören German A. Korobovs automatkarbin TKB-517. På 1950-talet testade den sovjetiska armén automatkarbiner för att förbättra AK-47 som då var standard. Som bekant blev det AKM som kom att tillverkas, detta trots att TKB-517 var såväl, billigare, enklare, lättare, hade bättre precision och var mer kontrollerbar.
Från länken ovan skrev:Korobov submits his improved TKB-517 rifle, still based on the Kiraly type delayed blowback action; this weapon was extensively tested against modified Kalashnikov AK rifle, as well a number of other designs, and found to be superior to all. Korobov was found to be most accurate and controllable in full automatic mode (primary mode of fire, according to Soviet tactical doctrine), especially when fired from the shoulder or from the hip. It was also significantly lighter and less expensive to make than modified AK. Nevertheless, Soviet Army preferred less effective, but familiar and already well established Kalashnikov AKM over the more effective and lighter, but entirely new design.
Fördelarna över AKM härrör från att Koborov valde en annan mekanism än Kalashnikov;
Från länken ovan skrev:TKB-517 is delayed (retarded) blowback operated weapon, that uses two-part bolt system, designed prior to WW2 by Paul Kiraly of Hungary. In this system, bolt has two parts - lighter breechblock with breechface and extractor, and heavier bolt carrier. A two-arm lever is interposed between these two parts; lower arm of the lever rests against the receiver when bolt is fully closed. When gun is fired, pressure in the chamber forces the cartridge case backwards and against the breechface. Bolt begins to travel back, but the lever acts as a mechanical disadvantage, transferring the short movement of the light bolt to the longer movement of the heavy bolt carrier. This action is sufficient to slow down initial movement of the breechface before the bullet leaves the barrel. Once the pressure in the barrel is low enough, the lever breaks the contact with the receiver, and the rest of recoil cycle both bolt parts complete as a single unit. Similar system later has been used in the French FAMAS assault rifle.
Någon som har en bild som illustrerar hur mekanismen fungerar månntro?