Caliber: .223 Wylde 5.56 Match Grade – Upper Receiver: – Assembled Upper Receiver – AMBI Charging Handle – SKELTON Nitride Bolt Carrier Group – Barrel: – .223 Wylde 5.56 Match Grade Nitride (TRUE 16 Overall Length barrel W/ TCS system) – Mid Length Gas Tube – ADJUSTIBLE .750 Gas Block – Roll Pin – 1/2×28 TPI Thread – 1:8 Twist Rate – Built it Compensator – Lower Receiver: – Complete Lower Receiver – FLAT Olympus9 3-6Lbs Trigger – NU Custom Grip – Enhanced Trigger Guard – EXTENDED MAG RELEASE BUTTON – EXTENDED TAKE DOWN PINS – SAFETY – Muzzle Device: Built-in Tunable Compensator System – Stock Kit: – BATTLELINK Extreme Duty Minimalist Stock – SRS UPGRADED SILENT CAPTURE – Handguard: – 13 Aluminum Jester scalp Rail – MLOK Style – Barrel Nut with Rail Attachment and Screws – Material: 7075 T6 Aluminum – Color: Black Armor Cerakote