Ive tried watching some videos regarding it but i ended up more confused than anything
Russian Space Magic is cool tho
In: 2
The general idea is that two rounds are fired before the recoil reach the shooter.
So the barrels and internal mechanism move back when you fire it and it manage to fire twice before it has reached the end of the travel and the recoil reaches the shooter.
You can see the moment of the barrel clearly in [this this video](https://youtu.be/DJxpncKswEg?t=39)
An in-depth explanation of how the feeding of the second bullet work can be seen in[in this video](https://www.youtube.com/watch?v=gtMssTSnRHU)
The German H&K G-11 manage to fire 3 rounds before the recoil hit the shooter. It was possible because of the careless ammunition [https://www.youtube.com/watch?v=QGKcvM2Hh4g](https://www.youtube.com/watch?v=QGKcvM2Hh4g)
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