I absolutely love this pack, especially the weapons. The Blufor weapons have that nice metallic "pop" I like in an M16/M4, and the Opfor's have a good rattly sound I like in an AK (not to mention all the other weapons on both sides which fit very well :P).
The only thing I am not a huge fan of is the sonic cracks. I enjoy a nice, loud firecracker like "POP" when a weapon is fired in the distance (like in real life); but when I have an M240 rattling off behind me in game and I have to either take off my head phones or turn them down it breaks the immersion for me.
I am not saying to change them, people seem to enjoy them and they are indeed quite realistic, but they aren't for me.
Keep up the good work, and this is staying in my addons folder for a looooooooooong time!
Edit: Heres a video I made using your sounds, excluding the sonic cracks and impact effects.