Professional Ordnance carbon fiber AR-15's were junk and, due to a bunch of proprietary parts, they were incompatible with most standard AR-15 parts/accessories. When Bushmaster took them over years ago they went through the gun completely and changed everything to standard (mil-spec) dimensions and also made them reliable. The Bushmaster guns are good shooters, I used a C15-M4 as my patrol rifle for several years.
Your brother wants too much money (especially since you're his brother) for what he has. Bud's Gun Shop has brand new flat top Carbon 15s with a red dot for $699 right now.
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper
Last edited by WC145; January 1, 2012 at 12:29 PM.