I am about to buy a barrel for my AR build and I just want to figure out what twist i want. I've found barrels in 1:7 and 1:9 but im just not sure which one i want. I don't know what ammo ill be shooting but ill use whatever is at the local gun store that will work with the barrel twist i have (bullet weight). im going to use this AR to shoot targets and to shoot woodchucks, fox, coyotes, etc. i dont expect to be shooting over 200 yards but it'd be nice to have a barrel that i could shoot that far with. i plan on getting a scope for the AR and some iron sights. could anyone shed some light on this issue? thank you!