Our AR-15 Upper Build (Mil-Spec) comes fully assembled and includes all the components necessary for a functioning Upper. The Upper Receiver, 16" Barrel and Bolt Carrier Group are made in the U.S. Included is a 16" Free Float Keymod Rail and Birdcage Muzzle Brake. Each part conforms to Mil-Spec dimensions and is made from quality materials to ensure accuracy and reliability.
Every Upper Build is Test Fired Before Shipment To Guarantee Performance. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds.
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