I an having the same problem with the m4a1. Iam using the most updated preset for the Odin's Ravin controller.(Odin's Raven: Call of Duty Modern Warfare 2) Its seems as if it goes through the motion and when it finishes the glitch the gun is actually not reloaded. I tried it with the ACR and it worked fine. I tested it out online off line and I still can't reload the m4a1. I also made sure to turn of the left tac switch to see if the gun would reload and it doesn't. Aside from reloading the drivers, which I've done, what could be the issue?