Would like FeedBack on these 2 FT systems

They are for a homegrown Minor State: Midgard Herding

1st is Bifrost Gauss Rifle = a K3
Mass is 6 point cost 28

And the Second is:
AA Battery from More Thrust Book 
What in FT(2.5) should the mass/point cost be

Thanks,

DOC Agren

[Mostly a lurker on the List]