Agreed, I'm not sure I see the .338 doing the job of the .50...
Still, the MG338 fires .338 and weighs seven pounds less than the M240...color me intrigued.
In any case, SIG now manufactures nearly the entire range of small arms for the infantry platoon - sidearms (M17/M18), rifles (XM5), automatic rifles/squad automatic weapons (XM250), the corresponding ammunition (9mm and 6.8mm), and suppressors. And they're well situated to capture additional contracts. It's an impressive accomplishment.