Features:Harrington & Richardson brings another blast from the past with this lightweight Government Carbine. The H&R "Special Forces COTS" M16A2 lower M16A2 upper and pencil profile barrel make this a light handy rifle perfect for commandos in the jungle or general lightweight plinking. The combination of 1/7 twist barrel and A2 sights allow you to sling heavy bullets at longer ranges. Some have suggested using as a base for your "Blood Diamond" clone builds.Details:Caliber: 5.56 NATOBarrel Length: 14.7" P/W to 16" OALBarrel Profile: PencilBarrel Steel: 4150 Chrome Moly VanadiumBarrel Finish: ParkerizedChrome Lining: YesMuzzle Thread Pattern: 1/2" x 28Twist Rate: 1 in 7"Barrel Extension: M4Gas System Length: CarbineDiameter at Gas Block: .625"Gas Block Type: Rifle Height Front Sight BaseMuzzle Device: A2 -styleReceiver Material: Forged 7075-T6Lower Receiver Type: H&R M16A2 COTS Special ForcesUpper Receiver Type: M16A2 W/ M4 feed rampsHandguard Type: Standard Carbine 6 holeBolt Material: Carpenter 158 SteelBolt Carrier Profile: Full AutoFire Control Group: Standard Mil-Spec Trigger GroupGrip: A2-styleStock: CAR-styleBuffer Tube Length: Carbine 6 PositionBuffer Tube Diameter: Mil-specOverall Length: 32 inchesWeight (as configured): 6 lbs