The 6920 is a solid rifle. Most of your cheaper target ammo will only give you 3 MOA @100, so don't get too down on yourself if that's all you can wring out of the rifle. With decent glass and some quality, match grade ammo (or special recipe handloads), you can certainly cut that down to under 1 MOA. Keep in mind that the 6920 is a combat rifle...expect combat accuracy.
Most folks have 1-2 fliers per string in their groups. I would recommend shooting 5 round groups to truly gauge accuracy. If you do your job, there should be 3-4 rounds in a cluster (sans the flier). A 2 round group is by no means an accurate account of what the rifle can do, or what you can do with it.
I LOVE the Colt rifles. My 6940 recently ran a 3 day carbine course (1200 rds) without a hiccup. It's my 'go-to' long gun.
P.S. I think you forgot the pictures...