Product DescriptionThe ATI MilSport upper receiver assembly is chambered in 5.56x45mm and built with a compact 7.5-inch barrel finished in black nitride for added durability and corrosion resistance. Its 1:7 twist rate is suited for a broad range of compatible projectile weights, while the 7-inch M-LOK handguard provides a lightweight, modern platform for accessory mounting. A continuous top rail supports optics and other accessories, making this MilSport upper a strong choice for shooters seeking a compact, maneuverable setup.Product Highlights Compact ATI MilSport upper receiver assembly chambered in 5.56x45mm 7.5-inch barrel with black nitride finish for wear and corrosion resistance 1:7 twist rate designed for versatile ammunition compatibility 7-inch M-LOK handguard offers modern accessory attachment capability Full-length top rail allows easy mounting of optics and sighting accessories Specs Product Type: Upper Receiver Assembly Caliber: 5.56x45mm Barrel Length: 7.50 in Barrel Finish: Black Nitride Twist Rate: 1:7 Handguard Length: 7 in Handguard Interface: M-LOK Color: Black UPC: 810113112220 MPN: ATI15MS556ML7 Brand Name: ATI 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.