>>64384000 (checked)
Imagine high-pressure 5.56 FABRL in a CT case. Half the weight of brass, short enough to fit in a grip magazine. Riflemen could carry 5.56 lethality in little 11.5 inch barrel MP7/LC Charger-style guns, which lets them carry loitering munitions and 30mm airburst grenade launchers. Your SAW gunners could shoot for days because they have obscene amounts of ammo and the chamber stays ice cold. Failures to feed and extract become notions as obsolete as keeping your powder horn dry. It's actual sci-fi shit.
>>64384013
The most important thing is that it would have kickstarted CT adoption, see above. However, of the three NGSW contestants, it was the lightest.
The whole idea of NGSW was retarded in the first place, it was hard to make a good service rifle with the Army's projectile at speed requirement, and certainly nothing better than the M4. They just wanted a battle rifle. GD had something going on with their recoil control system, so it would have been the least shitty to use, and the composite ammo was neat. Textron would have been the least shitty to carry, and I believe had constant recoil so it wasn't too bad. Sig had none of that.