Product DescriptionThe ANDRO CORP INDUSTRIES U55616ML is a complete AR-15 upper receiver assembly chambered in 5.56 NATO and built around a 16 inch barrel for dependable performance and versatile use. Designed to fit mil-spec AR-15 lowers, this complete upper comes assembled with an M-LOK handguard, gas system, and A2 flash hider installed. The barrel is made from 4150 chrome moly vanadium steel and finished in Melonite QPQ for strong wear and corrosion resistance. A mid-length gas system, .750 low-profile gas block, 1:7 twist rate, and M4 feed ramps help deliver smooth cycling and reliable feeding across a wide range of .223 Remington and 5.56 NATO loads. Finished in black, this upper offers a streamlined platform ready for accessories and range or field use.Product Highlights Complete AR-15 upper receiver assembly chambered in 5.56 NATO with a 16 inch barrel 4150 CMV steel barrel with Melonite QPQ finish for enhanced durability and corrosion resistance M-LOK handguard provides a lightweight, modular mounting platform for compatible accessories Mid-length gas system with .750 low-profile gas block promotes smooth operation and reduced stress 1/2x28 threaded muzzle with installed A2 flash hider, plus 1:7 twist and M4 feed ramps for dependable performance Specs Brand: ANDRO CORP INDUSTRIES Manufacturer Part Number: U55616ML UPC: 736684144562 Product Type: Complete upper receiver assembly Platform Fit: AR-15 Caliber: 5.56 NATO Barrel Length: 16 in Overall Length: 24.75 in Weight: 4.94 lbs Barrel Material: 4150 Chrome Moly Vanadium Steel Finish: Melonite (QPQ) Color: Black Gas System: Mid-length Gas Block: .750 low-profile Twist Rate: 1:7 Feed Ramps: M4 Handguard Type: M-LOK Thread Pitch: 1/2x28 Muzzle Device: A2 flash hider Condition: New 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.