These AR-15 pistol build kits give you all the parts to build your own AR-15 pistol. These kits come with different barrel lengths and handguard configuration. Including with or without 80 percent lower receivers. The kits have complete build assembled uppers or unassembled depending on the pistol kit. Also, upgrading bolt carrier group to nickel boron or titanium nitride, and different colors of the pistol kit are available. The Pistol Kits do not include the Magazine or Sights.