Has anyone here put rounds downrange with Bushmaster's Carbon 15? The carbon fiber receivers sound like they can take some punishment, and they're not very expensive compared to AR15s with similar features (~$820--impactguns.com).
I'm trying to figure out if having a carbon fiber boom stick would be worth it, or if it's just a marketing gimmick.
http://www.impactguns.com/store/AZ-C15M4PST.html