I roll with a Colt carbine fairly often, when I am not using a bolt gun.
This one one is pretty much a dedicated hunting rig, with a White Oak 7 twist, that has been turned down to a pencil barrel profile, and is housed in a carbon fiber free float tube.
Trigger is a Geissele.
Scope is a 2.5-8 Leupold with BDC cam set for MK262, 77 grain SMKs.
The buffer tube is wrapped in vet wrap, so it does not rip out my beard hairs..