Just as a heads up, don't use the BC on a smartgun. It makes the weapon even worse than usual. You will consistently miss point blank bursts, and even with the BC you don't deal enough damage to justify the accuracy penalty.
On another note, the smartgun needs a serious buff, it's shooting cotton balls at the moment and has less ammo than a regular marine with ammo being harder to get as well. Also you will be meta targeted, but your weapon is useless so you can't even defend yourself.