Product DescriptionThe Daniel Defense MK18 Upper Receiver Group is a compact, duty-ready complete upper built for AR-15 platforms chambered in 5.56x45mm NATO. Designed to deliver an excellent balance of size, weight, and performance, it features a 10.3 inch cold hammer forged barrel with a durable black phosphate finish, a rugged 7075-T6 aluminum receiver with black anodized finish, and the proven DD RIS II MK18 quad rail handguard in Flat Dark Earth. This upper receiver group uses Daniel Defense&';s Bolt-Up System rail design that was rigorously tested prior to fielding by USSOCOM, making it a strong choice for shooters who want reliability, accessory mounting capability, and close-quarters maneuverability. It also includes an independently ambidextrous GRIP-N-RIP charging handle and comes standard with an M16 profile bolt carrier group for a ready-to-install setup.Product Highlights Complete Daniel Defense MK18 upper receiver group for AR-15 rifles chambered in 5.56x45mm NATO. 10.3 inch cold hammer forged barrel with black phosphate finish for durability, accuracy, and long service life. Flat Dark Earth DD RIS II MK18 quad rail handguard with Bolt-Up System tested for USSOCOM use. 7075-T6 aluminum upper receiver with black anodized finish for strength and corrosion resistance. Includes M16 profile bolt carrier group and ambidextrous GRIP-N-RIP charging handle for a complete, high-performance upper assembly. Specs Brand: Daniel Defense Model: MK18 Upper Group MPN: 2300408013011 UPC: 852548002592 Platform Fit: AR-15 Caliber: 5.56x45mm NATO Barrel Length: 10.3 in Barrel Type: Cold Hammer Forged Barrel Finish: Black Phosphate Barrel Material: Chrome Moly Steel Twist Rate: 1:7 Receiver Material: 7075-T6 Aluminum Receiver Finish: Black Anodized Handguard: DD RIS II MK18 Quad Rail Handguard Color: Flat Dark Earth Charging Handle: Ambidextrous GRIP-N-RIP Bolt Carrier Group: M16 Profile Included Gas Block: Low Profile Muzzle: Flash Suppressor Sight Configuration: Flat Top / Optic Ready Country of Manufacture: USA 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.