Yeah some don't really know how to use the AR. The key, when firing mid-ranged and semi-close, is not to hold on the trigger, but squeeze it every so often, as simple bursts, like the BR. You'll win the AR vs AR and many other variations- every time.... It kills MUCH faster. And yea i agree to earlier posts:
1. Picking up a BR shows you know what you're doing in stead of running n' gunning like rambo with the AR
2. It's part of what defines Halo.
Also, if you're a true halo player, u'd use the carbine :p
[Edited on 04.04.2011 9:59 PM PDT]