[quote=Barioth]
I was under the impression that my original Machine-gun lance was 4 units, so by logic, downgrading it to an SMG should've made it a 3 at most. If you look at the picture you can see the gun which isn't big at all, and the adding of an energy bayonet wouldn't really change the weight that much. Keep in mind the difference between a solid blade and an energy blade. Assuming the properties of Ethus, I'd like to speculate that an Ethus blade weighs near nothing. I imagine Ethus as some kind of plasma/energy , meaning it weighs next to nothing. I'd like to argue that an Ethus blade is just 1 unit, and that the size of the blade doesn't matter to the weight. The blade size and intensity does matter to operational time and power conservation which I believe is separate from weapon class and relates more to the basic inner workings of the frame. So If I counted the gun as 3, the vulcans as 1, and the Ethus Blade as 1, It leaves 1 unit which Dynamo said I could make the amount of missiles, bombs, and chaff smaller to fit 1. I dropped the bombs and assumed the rest was Ok. It was my fault for being unspecific but the frame only has 6 missiles, which are a lot smaller than any modern missile we have now, while the chaff is just small canisters attached to the legs that can be discharged at any time.
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Well The gm will have to clarify what Ethus is, I always assumed it was something akin to elirium from Xcom, crystals that just emmited energy somehow. brittle and very volatile, ect. but even if you are class 6, you'd still be slow and lack full flight capabilities. I am splitting the Frame's in to five segments, class 1, scout, very fast, no armour, small weapon. can fly like a bloody bee/falcon. 2,3,4, recon, tougher, can fly, but not super agile, somewhat fast, 5,6,7, infantry, can jump-boost/rocket sprint, tougher, decent firepower ect. 8,9,10, tank like, can take a nuke to the face, can't fly, can only jump slightly ect. 
and even with those 'vauge' catagories there are ways round them (see the railgun mech). but the gm said if you've got a high(er) class of weight you can't fly/go super fast.