Hi. I recently bought a Aftermath Kraken. After shooting about 2500 rounds with it, I realized that it's shooting maybe 100 fps slower than it was when it was new, and that the shooting operation is a little louder than before. I cleaned the barrel but it changed nothing.
Maybe when storing it I left the spring compressed and it lost some of its power? The solution would be buying a new spring.
But maybe its something else, and I need your help to find what it is, and what are the solutions to fix it.