The Complete Upper Is constructed Of Billet machined 7075-T6 Aluminum With Proprietary Extended Aluminum Hand Guard W/ Magpul M-LOK Mounting System And Integrated Upper/Hand Guard Stainless Steel Anti-Rotation Pin. Its Match Grade 416R Stainless Steel Barrel Has Polished Crown/Feed ramps, And Is Threaded. The Upper Also Utilizes Enhanced Black Nitride M16 BCG, Lightweight Forward Assist, Radian Raptor-Sd Suppressor-Optimized Ambidextrous Charging Handle, And a Direct Impingement Gas System. Type: Complete Caliber: 223 Wylde Sights: Optic Ready Barrel Length: 10.50" Barrel Material: 416R Stainless Steel Twist: 1:8" Barrel Description: Steel Threaded Barrel Finish: Black Receiver Finish: Flat Dark Earth Cerakote Handguards: Extended With Magpul M-LOK Handguard Finish: Flat Dark Earth Cerakote Barrel Length Range: 10" To 10.99"