Brand: Double StarModel: ARP7Caliber: 5.56x45mm NATOModes of Fire: Semi-AutomaticOverall Length: 24.5"Barrel Length: 7.5"Barrel Type: Heavy BarrelTwist Rate: 1:9Barrel Material: 4140 Chrome MolyBarrel Features: M4 Feed Ramps, Free FloatingSight / Gas Block: Low Profile Gas BlockMuzzle Device: Big Timber BrakeHandguard: DoubleStar 7" Cloak MLOKUpper Receiver Type: FlattopUpper Receiver Material: Forged Aircraft 7075 T6 AluminumUpper Receiver Coating: Anodized to Mil-SpecUpper Receiver Features: Brass Deflector, Ejection Port Door Assembly, M4 Feedramps, "T"-Marks, Forward Assist, Dust CoverLower Receiver Material: Forged Aircraft 7075 T6 AluminumLower Receiver Coating: Anodized to Mil-SpecCharging Handle: Billet Backbone Charging HandleFire Control Group: Standard Trigger GroupMagazine Capacity: 30 rd.Pistol Grip: Ergo GripOther Features: Enhanced Extraction SystemAction: Direct Gas Impingement