Okay, I wasn't going to say anything else here, but now I'm kinda getting annoyed.
Cathul Thuku said:
I know about the implications of recoil vs. weapon weight and I expect the railgun mechanisms to be rather heavy.
No, you really don't. I've read your writing. You might realize that it's a thing, but it's pretty clear you think recoil is a thing that happens to other people. There is no universe in which the weapon you're describing would be shoulder fired, but somehow I get the impression that you're gonna be doing backflips while shooting the wings off of flies or some such nonsense.
Cathul Thuku said:
the bullets can be alusteel, though.
No. No they can't. Not if you want them to be worth a damn. A projectile with the density of aluminum is going to have the penetration power of a geriatric patient with erectile dysfunction and a heart condition that takes Viagra out of the picture. Sure a rail gun could get them going super duper fast, but it's a bit like trying to knock pears out of a tree with your pecker. Just because it can be done doesn't mean that it's the best or even a particularly effective way to go about your business.
Lily Kuhn said:
That being said, do you realize how big 12.7x108mm is?
I think we both know the answer to that question.
Cathul Thuku said:
With the 12.7x108s I can use slugthrowers for more than just engaging infantry, unlike 5.56x45s or 7.62x54s, which are pretty much restricted to an anti-infantry role.
There's so much awful to unpack in this one sentence, I don't even know where to begin. For starters, the 7.62x54r (note the "r" designator, if you're going to use Soviet rounds at least get them right) can be used in an anti-materiel role. You know, kinda like most rounds in the .30 caliber range. Or even the 5.56, if you know what you're doing with it. Itty bitty rounds can still poke holes in stuff with a steel penetrator core, don'tcha know.
The weapon you're describing is not an antipersonnel weapon. Period. It won't have to be lightsaber resistant, because if a Force User is coming at you with a lightsaber, good freaking luck trying to use it as a melee weapon. Good luck trying to shoot anything moving with any speed at all at close range. Or at any range, for that matter.
There are a handful of weapons in this category in use on Chaos, and nearly none of them see use in PVP. Those that do see use are limited to glorified sniper rifles, and I can count on the fingers of no hands the number of people I've seen play it straight where incoming sniper fire is concerned.