Board Thread:Speculation House/@comment-15049228-20131004024906/@comment-173.58.63.77-20131004033514

They probably use Mass Effect technology to create a small sand grain sized piece of metal that is then propelled and augumented with dust to create a very powerful projectile. Therefore meaning they have thousands of rounds at their disposal.

IN all honesty, all the main characters with projectile guns have super extended mags, never need to reload, and do infinite damage to everything but plot-important enemies.