Yep, 6.8 is the caliber being considered, just have to decide which format of ammo (Sig's steel/brass ammo, GD's polymer cased, etc) and carbine/LMG system.
ETA: That's not 6.8SPC, it's a 6.8mm 115gr bullet traveling at nearly 3000 fps.
ETA: That's not 6.8SPC, it's a 6.8mm 115gr bullet traveling at nearly 3000 fps.

