[MikkOwl]

I heard lots of stuff through youtube and other amateur sources, and those are crappy microphones AND usually major distortion (the sound is too loud for the microphone to correctly record. It is called 'clipping'). The sounds I've heard so far in this game is what I would expect it to sound like in real life, when removing the distortion & low quality microphones. Convincing, fascinating and satisfying. They also sound pretty similar to the very few high quality recordings I have heard of a Bf 109 in flight (some audio CD recording for hardcore fans).

The guns firing should probably be kind metallic plonky. The bolts in the MG's/cannons slam hard and quickly back and forth, and since the guns are directly attached to the frame of the aircraft, the vibrations go all the way into the cockpit. Lots of cavities and hollow spaces inside for the sound to bounce around in, too. On the other hand, the loud bang from gases shooting out of the barrel, and supersonic crack of the projectiles, have to go through a thick glassed canopy and pilot flight helmet / radio. This should muffle the bang & supersonic cracks.