hmm, well the issue I encountered on both my G36 was that the hop would get clogged, a bb would jam in the lips and would not shift untill i put a cleaning rod down or took it apart.
The K was resolved with a new tappet spring - it was an old second hand JG gearbox I was using and the spring had weakened.
The same thing developed with the C, I bought the gun second hand on the forums, that one had the same issue, but a new tappet spring did not resolve the issue... it's still currently not working and will be the next gun on my to do list.
Sorry, been straying off topic! 😅
Just bought....
Long MP5/G3 rail mount so I can mount a reflex sight a little further up front on the MP5K!
And also a rubber M9 bayonet and sheath - intend to use this next time at Grange in Brum city centre!
Green 50. maple leaf for 1911 meu too.