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