Harrington & Richardson Complete Commando, XM177E1 10″ Gray Pistol

Caliber: 5.56 NATO
Barrel Length: 10″
Barrel Profile: Pencil
Barrel Steel: 4150 Chrome Moly Vanadium
Barrel Finish: Parkerized
Chrome Lining: Yes
Muzzle Thread Pattern: 1/2″ x 28
Twist Rate: 1 in 7″
Barrel Extension: M4
Gas System Length: Carbine
Diameter at Gas Block: .625″
Gas Block Type: Rifle Height Front Sight Base
Muzzle Device: A1 style
Receiver Material: Forged 7075-T6
Lower Receiver Type: XM177E2
Upper Receiver Type: M16A1 w/o feed ramps, Gray
Handguard Type: Carbine 6 hole handguard
Bolt Material: Carpenter 158 Steel
Bolt Carrier Profile: Full Auto
Fire Control Group: Standard Mil-Spec Trigger Group
Grip: A1-style
Pistol Brace: HAR-15 Adjustable Pistol Stabilizing Blade
Buffer Tube Length: Carbine, 2 Position
Buffer Tube Diameter: Mil-spec
Weight (as configured): 6 lbs