When I bought the SRC in October, it had many manufacturer defects. I sent it back, they made it worse, and then I gave it to my local JungleToy for 3 months. Most problems have been fixed except for one. When I shoot the gun, the BBs seem to hop up a little and then drop down about 50 or so feet later. I compared this gun to my stock Marui G36C, and the Marui shoots a whole lot farther and faster than the M4 does. (Supposedly, SRC stock=320fps, Marui stock=285fps). The manager of the JungleToy I went to just re-built the hop-up unit, because he thought that was causing the problem. Now I'm getting no range with the gun and the accuracy is spreaded. If anybody knows how to help, it would be greatly appreciated. And by the way, I'm using a stock SRC 8.4v 1600mAh Ni-MH battery in the gun. This shouldn't be the problem, as I also have 2 custom batteries of the same mAh and voltage.
