I think the Beta 4 hase more to do with it than anything els. With my specs I get the same results. and the AMD chip I am running is nuthing compaired to the new I7 2600K.
I only get betwean 30-40 FPS at normal 10,000 ft flight. in battle It drops to around 20-30FPS. as for the gun issue I get the standared 12-15 fps. and I am running at high settings. The looks are linked to the GPU and the FPS is linked to CPU. I would like to see your total system specs. I am thing of going to Intel but if the FPS is no better than my old AMD I see no reason to spend that much money.