Geissele Automatics presents the AR-15 16" Super Duty Nano Complete Upper Receiver, a pinnacle of engineering excellence. Designed with a Surefire Closed-Tine Flash Hider and a 1-7 twist rate, this upper receiver ensures superior performance and reliability. The anodized finish and Geissele contour add to its durability and sleek appearance. Ideal for range time and training, this upper receiver is a testament to Geissele's innovation and quality. With a mid-length gas system and a Nanoweapon Reliability Enhanced Bolt Carrier Group, it offers smooth operation and ease of use. Geissele Automatics is renowned for its commitment to premium performance and durability. Key Features: - Manufacturer: Geissele Automatics - Model: AR-15 16" Super Duty Nano - Caliber: 5.56 mm NATO - Condition: New - Action: Semi-Automatic - Finish Color: Black - Barrel Length: 16" - Number of Magazines: - Capacity: - Optic Footprint: - Unique Features: Surefire Closed-Tine Flash Hider, Nanoweapon Reliability Enhanced BCG - Night Sights: No - External Safety: No - Threaded Barrel: No - What's In The Box: - Weight: 5.10 lbs - Length: 16" - Width: