Product Description The Radical Firearms 5.56mm complete upper assembly is a MIL-STD AR-15 upper designed to drop onto any MIL-STD lower receiver, making it a strong choice for finishing a new build or upgrading an existing rifle. It features a 16" Socom-profile barrel with a 1:7 twist and a free-float M-LOK handguard to support accuracy and accessory mounting while helping keep hands cooler during extended range sessions. Built around a forged 7075-T6 upper receiver with Type III anodizing, this upper includes a nitride bolt carrier group and a Mil-Spec charging handle, along with a forward assist and dust cover for a complete, ready-to-run setup. Product Highlights Complete MIL-STD AR-15 upper assembly designed to fit standard MIL-STD lower receivers 16" 5.56 NATO Socom-profile barrel with 1:7 twist for broad ammunition compatibility 15" free-float M-LOK thin-rail handguard for lighter weight and accessory flexibility Forged 7075-T6 aluminum upper receiver with durable Type III anodized finish Includes nitride bolt carrier group and Mil-Spec charging handle for a complete build-ready upper Specs Brand: Radical Firearms Manufacturer Part Number: RF00325 UPC: 816903025633 Platform: AR-15 (MIL-STD) Caliber/Chamber: 5.56mm / 5.56 NATO (commonly used with .223 Remington) Barrel Length: 16" Twist Rate: 1:7 Barrel Profile: Socom Profile Barrel Material: 4140 Chrome Moly Vanadium Barrel Finish: Melonite Gas System: Medium Length Gas Block: .750 Low-profile Gas Block Muzzle Thread: 1/2x28 Muzzle Device: A2 Flash Hider Barrel Extension: M4 Feed Ramp Upper Receiver Material: Forged 7075-T6 Aluminum Upper Receiver Style: M4 MIL-STD Upper Receiver Finish: Type III Anodizing Forward Assist: Yes Dust Cover: Yes Handguard Type: Free Float Handguard Style: M-LOK Thin Rail Handguard Length: 15" Charging Handle: MIL-STD Bolt Carrier Group Included: Yes BCG Finish: Nitride Color: Black 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.