First to be fair I should put this...
"Introduced inIntroduced in 2590 by the Terran Hegemony, the Gauss Rifle utilizes a series of electromagnets to propel slugs of ferrous nickel-iron alloy at extremely high velocities"
Being ferrous it is less likely to require a sabot like armature from my understanding since it isn't non-ferrous like aluminium. And I saw no mention of one on sarna.net
I agree that anything getting hit with something sabot/armature or not at mach 5 is going to cause as much if not more damage probably due to increased mass...unless maybe if the sobot or armature is made out of some crazy sponge like super shock absorbing material
A sabot is a device used in a firearm or cannon to fire a projectile, such as a bullet, that is smaller than the bore diameter, or which must be held in a precise position. The name "sabot" comes from a French word for wooden shoes traditionally worn in some European countries, also called clogs.
Now in further response to your general statements...
From wiki (again)...
A coilgun is a type of projectile accelerator that consists of one or more coils used as electromagnets in the configuration of a synchronous linear motor which accelerate a magnetic projectile to high velocity. The name Gauss gun is sometimes used for such devices in reference to Carl Friedrich Gauss, who formulated mathematical descriptions of the magnetic effect used by magnetic accelerators.[/color]
Coilguns consist of one or more coils arranged along a barrel. The coils are switched on and off in sequence, causing the projectile to be accelerated quickly along the barrel via magnetic forces. Coilguns are distinct from railguns, which pass a large current through the projectile or sabot via sliding contacts. Coilguns and railguns also operate on different principles. The first operational coilgun was developed and patented by Norwegian physicist Kristian Birkeland.
Railgun projectile...(I guess the "sabot" is generally referred to as an armature, but is somewhat similar principle.) (Do we actually know if the gauss is a coil gun, railgun...or what?)
So while he was kinda off relating to the game, in general he wasn't to far off about there being a sabot...or sabot like mechanism, ( or armature) in similar real world weapon types.
Hmm. Well then. I concede and redact what I said earlier. Sabots in a coilgun. And yeah, Gauss does refer specifically to coilguns.
I'd always been under the assumption that futuristic coilguns would be designed to suspend the round hovering perfectly in the very centre of the barrel, to reduce wear and friction, but there is no way for sure to know exactly how BT gauss rifles would be designed.
The point about a lethal mach 5 ferrous sabot does certainly still stand, but I'll take back the stuff I said about a sabot making no sense.