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, are available with or without SBA3 brace, and are available in Black, FDE, OD Green, Burnt Bronze, and Titanium Blue. 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. These feature a Spikes Tactical dedicated 9mm lower. These are available for $875 with an SBA3 Brace or $750 without. They come with a Glock 33rd mag. Get your order in today, these go FAST!