Originally Posted by
LineageRazor
This isn't the first short-barreled gun MCH has access to, and the Gauss floated in front of that one, too. The thing is, though, that the Gauss Barrel was ALWAYS intended to be a drone hovering in front of your gun, not an actual attachment. Even for guns long enough to LOOK like it's attached, if you examine closely it's not QUITE attached. The Gauss Barrel floats in front of your gun, and as bullets pass through it it accelerates them for extra damage.
MCH's autoturrets also hover, so this is just another example of the same technology.