@Nik's initial Forcefield science
Thank you for looking into my mono-force-rapier-thing idea!
I'm not sure if the crescent blade idea will work--PW may have slipped up. Before, PW has said that the maximum distance a forcefield can be projected is 2.5x the thickness of the projecting material. Technically, he said it was 5x the radius of a sphere, so maybe the details are different with different shapes. I'll ask.
I've thought about arm mounted forceblades, and generally my opinion is that they shouldn't be used unless there's some form of mechanical sheath to retract them. They can't be disabled, and a passing sweep can take your leg off. People tend to swing their arms when they walk. These could make for a problem.
As for forcefield bullets and riot shields... Dunno. I foresee some problems with that, but it might or might not really work.
I have a pair of interesting ideas for forcefield bullets. I believe I talked about them in IRC some time ago. One is basically just a method to have non-SM plasma bullets, and the other uses the 'chopping' effect of activating forcefields to carve out a section of enemy armor, and then uses the explosion from the detonating projection material to propel that section through the rest of the enemy's armor.
However, what actually I can suggest, is this: substitute a PSL "Testament" for that gauss machinegun.
Shortly after I designed the testament, I've been wanting to make an intermediate between the testament and PSL, called the "Doctrine". If the testament is an LMG, the doctrine would be an HMG, like the M2 Browning. It would be a better fit for an APC. Of course, I've been planning on making many things, most of which I haven't gotten around to...
@Paris
since the durability of the hilt is not that important,
Why wouldn't it be important? If the hilt's broken, it goes off like a bomb. Yes, we likely wouldn't need to have maximum strength forcefields, but even relatively weak ones will go off like a grenade. Most users won't have Milnoplate-level armor, so that's a rather bad thing.
You could even make the hilt really flexible, extendible and programmable
None of these things are necessarily possible to do with a projector material. We certainly can have overlapping plates of forcefields, but the inherent resistance they have to each other would likely make a whip or some of your other ideas implausible.
@ComradeP
portable command center (if we even need this),
Probably don't need this. Quantum Entanglement Communicators can be backpack sized, and can link to command centers on other planets. At most, a battlefield command center would be a normal vehicle with extra QEC fuel, and exceptionally good radio equipment.
@Radio
Modularity is nice, but not limitless, and increases cost. A tank will need a different shape/frame than a transport, for example.
I think this is somewhat backwards, actually. Modularity reduces cost, because your tanks, APCs, AA vehicles, etc. all use the same production lines. In trade, it usually lowers the effectiveness of any given vehicle, because none of them were entirely purpose built
only for their role. Radio's correct if you're trying to make fully effective yet also modular vehicles, though.
IRL, such extreme modularity would be a terrible idea. 95% of the time, one or two mobility designs will work, so you might as well design explicitly for those two designs. Adding in another six alternatives to wheels is just going to waste money if they're ever used, and make the primary two designs less effective because they partially sacrificed effectiveness for versatility. That all said, this is a game where god is forgetful and doesn't really understand how physics work, so it might work great for us.
Though, one of the things I wanted to investigate was using (modified) sharkmist for the main frame. If that works, you can have a 'programmable' chassis, where you can indeed choose a main shape, let the sharkmist take that form, then slot in whatever the sharkmist can't form (generators, weapons, whatever).
This is a great idea. Programmable tank production! It would get around most of the major issues, I think. The only problem would be if sharkmist isn't a good structural material.