Product DescriptionThe DPMS Panther Arms upper assembly is built for 5.56 NATO performance with a 16 inch barrel and a 13.5 inch M-LOK handguard for modern accessory mounting and improved handling. This upper features an M4 barrel profile and a 1:7 twist rate, making it well suited for a wide range of common 5.56 NATO projectile weights. Constructed with a Chrome Moly Vanadium barrel, it is designed to deliver durability and dependable performance for range use, training, and rifle builds that require a lightweight, adaptable upper configuration.Product Highlights 16 inch 5.56 NATO upper assembly from DPMS Panther Arms for versatile shooting applications 13.5 inch M-LOK handguard offers flexible attachment space for lights, grips, and accessories Chrome Moly Vanadium barrel provides strength and long-lasting durability M4 barrel profile balances weight and handling for practical rifle setups 1:7 twist rate supports a broad selection of 5.56 NATO ammunition choices Specs Brand: DPMS Panther Arms Manufacturer Part Number: DP51655120177 UPC: 810141221239 Product Type: Upper assembly Caliber: 5.56 NATO Barrel Length: 16 in Handguard Length: 13.5 in Handguard Type: M-LOK Twist Rate: 1:7 Barrel Material: Chrome Moly Vanadium Barrel Profile/Description: M4 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.