[CLOSED PR] Kinetics improvements & magazines

[Cheffie]

I still think theres value in this though, even if theres not an emphasis on guns it will make the gunplay there is more interesting even if by only a little. And there isn't really any reason not to have this since it just adds more options in future while not taking anything away, such as large boxes for individual rounds.
However I do think this could be atomised a bit.