So I'm trying to get into this game finally and once I look into mags I understand literally nothing at all, I see all these mag types and have little to no grasp over which ones are the best, or how to even get them. I'm looking at this guide to know what to use for a FOnewearl but I don't even understand some things such as (100/A or C/FM) or (100/A/FF). I'm sure at least someone else around here has been as confused as me getting started and can help push me in the right direction.