Comments - FireFly182

Having 9mm ammo in an M4 would actually suck, as the standard 5.56mm ammo is more powerful thanks to it travelling much faster out of the barrel. The 9mm will travel around 1000 FPS (feet per second), whereas the 5.56mm NATO rounds used normally travel about 3100FPS.

The higher velocity also gives higher accuracy, thanks to the bullet going farther before veering off course. I personally would be perfectly happy if they swapped the SMG for the M4 and kept the M4 with the NATO rounds, and had seperate ammunition for the Glock. The benefit of this would be that the M4 wouldn't suck at killing stuff past the length of my *****, which isn't very far.

Also, there is such thing as an M4 that uses 9mm parabellum ammunition, but it is far less reliable than an MP5, although in a game I don't think you'd have a gun that jams anyway.