The pack is aimed at multiplayer and is to give players more customisation options for their character's. (wolfsgamingblog.com)
The guns felt meaty and I liked being able to customise them to a small degree, although I could have done with more customisation options and the ability to deck out my team as well. (wolfsgamingblog.com)
Playing through the game lets you unlock more customisation options and gives a little incentive to progress. (plusxp.com)