Big AUG looks awesome.
Also if they are using the same 6.8 load as SIG, and a 20" barrel, that thing is going to be hauling ass.
Previous specs reported by SSD for SIGs 6.8x51:
13" barrel = 135gr @ 2850fps
16" barrel = 135gr @ 3000fps
From the 20" Big AUG we might see 135gr @ 3100-3150fps, which would give a better probability of being able to defeat current Level IV / future 'IV+' plates.