@brad7, What mags are you trying to use? It uses the 20rnd 7.62x45mm EBR mag at the moment.
@ollie, http://ultimak.com/m12.htm , I plan on changing the M1 design a little to, considering that it is 2035 in the game, which is also why Im asking for suggestions. I will think about an M-14 though, but for right now, I want to focus on this.