Currently, we do not offer fully assembled uppers, though we do offer most of the custom AR parts to create your own upper receiver parts kit. If you prefer a full upper receiver for sale, we would suggest Bravo Company or Agency Arms. Both companies have a full upper with the Bootleg, Inc. PicMod® Handguard rail, so you can enjoy the benefits of our patented combination of both the popular modularity of the Picatinny mount and the lighter weight of the KeyMod (KMR) rail!