I think the accuracy should be decreased as you hold your mouse down, and it stays to its normal accuracy if you just click and fire one shot at a time. It seems like all weapon packs just make it fire random shots to make accuracy effect, but I don't know. These look cool though.
Also, mind releasing a save of that map, or some pictures? Looks really cool.
Another thing I wanted to say - I think the weapons should be closer to the body, since they look kind of far away from the body, (the muzzle) or a little bit long, especially the sniper rifles.