I notice that the list seem to be in a different order, and it looks like there are new lower level weapons to use for the Top portion of the Mechs. ( unless they been the the whole time and i am just crazy ....)

Apparently new Top weapons have been added and now you can start using top weapons when you hit lv 2, not lv 6 as it was before, because top weapon slots have been added for torsos lower than lv 6.. But this is only for the new players, since there is a matchmaking level restriction(Minumum matchmaking level is 10 for player level 11-20 and 20 for player level 20-150)
In case you wonder, 150 is the maximum level a player can reach at the moment.

Nice to see it was not something I over looked somehow. When looking at the new weapons, they seem to be not as bright looking compared to the other weapons.

I did know that 150 is the highest level though, saw it mentioned in some other topic before. Thanks for the info anyways.