Originally Posted by larson1122
Yep, the 6920 is good to go for both 5.56 and .223. If your rifle is chambered for 5.56, you can shoot both 5.56 and .223, but it is not recommended to shoot 5.56 in a rifle chambered for .223.
ETA: forgot to add another thumbs up vote for the Colt. Anything from Colt, BCM, DD, etc. would serve you quite well.
I've shot some 5.56 in my bolt .223. Don't know if I should have, but didn't notice any problems.
What rate of twist is best in an AR? Seems lots of people run heavy bullets, such as for deer. My bolt doesn't stabilize the heavies.