Haynes and Sons Guns custom AR9's are sold as a separate upper and lower. These feature a Bear Creek Arsenal 5.5" barrel, keymod or MLOK rail system, forward directing muzzle "cone" type brake, take Glock mags, have last bolt hold open feature, built on a Spikes Glock dedicated lower.  We incorporate a tested buffer system that has time and time again been the reason people can't get their AR9's to run. We use a heavy buffer and custom spring and they run like a sewing machine. They come with a Glock 33rd mag. There is only one available and it is Black This has been fired and runs excellent, there are some use marks on the MLOK rail, this also comes with a nice red dot that is circle dot in red or green. Asking $1200 with SBA3 brace, you will not have this chance again.  Trades and Layaway Welcome. We accept Bitcoin, Gold, Silver, Platinum, and Palladium.