Okay now that I'm convinced that I need a AR to round out my collection which one do I buy? If I buy a carbine I would prefer a true 16" barrel not the 14 1/2" with extra flash suppressor, 20" or a 24" barrel? Prices range from $850's to $1024. I believe that the 14 1/2" barrel on the Bushmaster's would lose enough velocity that it would harm the preformance of the cartridge. I read a story a while back about going to one of the shooting schools and people with that length of barrel was having problems knocking down the steel poopers. I welcome any suggestions.