You said that all the NC weapons are bad. I showed you exceptions. I said that a lot of NC weapons are bad, but the ones that aren't are every bit as good as the best weapons that the other factions get. The GD-7F has a slightly higher rate of fire than either of the other close range carbines that the other factions get, at 845 rounds per minute instead of 800. The damage is the same for each faction's close range carbine. It's pretty obvious that you don't have a clue what the actual weapon stats are, and just want to whine. Have fun with that.
Conservation of momentum. When you accelerate a bullet out of the chamber by any means, magnetic or otherwise, the rifle kicks back at you to achieve net zero momentum between the bullet and the gun.