I just picked up an E mag and a 4500 Flatline at IAO. I bought a Shocktech Drop Forward but it was a little too long. A suggestion was made to grind some of the dovetail on the battery away for recharging. Personally, with this gun I really do not want to do this. Does anyone have any suggestions for a drop forward? A pic of your E mag with the drop forward you are suggesting would be helpful.