Caliber: .350 LegendBarrel Length: 16 inchesBarrel Profile: MediumBarrel Steel: Chrome Moly VanadiumBarrel Finish: MeloniteChrome Lining: NoMuzzle Thread Pattern: 5/8" x 24Twist Rate: 1 in 16"Gas System Length: Mid-lengthDiameter at Gas Block: .750"Muzzle Device: A2 -style 350 LegendReceiver Material: Forged 7075-T6Receiver Type: M4Handguard Type: 13.5" M-Lok lightweight Panther handguardBolt Material: Carpenter 158 SteelBolt Carrier Profile: Full AutoFire Control Group: Panther Polished Trigger (PPT) - Nickel Boron CoatedGrip: Magpul MOEStock: Magpul MOEMagazine: 5 round ASC 350 Legend (1)Buffer Tube Length: CarbineBuffer Tube Diameter: Mil-specOverall Length: 32 inchesWeight (as configured): 9.1 lbsBackup Sights: Magpul MBUS Front & Rear Sights, Black *Includes 1 5 round ASC 350 Legend Magazine