Ballistic Advantage’s Modern Series AR-15 barrels are among the best values on the market. Their new video gives you some insight as to why that is. The basics are that these barrels are standard profiles rendered in 4150 Chrome Moly Vanadium steel with desirable twist rates and are QPQ finished (salt bath nitride processing) throughout.
It is worth noting that Ballistic Advantage QPQ finishes the barrels separately from the barrel extensions. This is important because if this process is completed with the barrel extension installed, the heat can cause the extension to loosen. There have been many cases of loose barrel extensions from barrel makers who do not understand this.
Almost all of these barrels retail for well under $200 and come with a 1 MOA guarantee. Check them out at Ballistic Advantage.