Information and Specifications: Barrel: 20" Heavy contour, Fluted to reduce weight and heat 4150 Mil-B-1159F Vanadium Alloy (machinegun rated) 70 Rockwell case hardened heat treated "5R" polygonal barrels are 2X harder then Mil-Spec & Hammer Forged barrels Corrosion resistant and 10 times thicker and hardness than mil-spec chromed lining "5R" Polygonal Rifled barrels from Rock Creek Barrels, Inc. BC-A5 Muzzle Device Chamber: 7.62X51 mm NATO (.308 Cal.) Method of Operation: Gas Piston operated, rotating bolt (short stroke system) Reversible piston / gas trap design (two modes of fire) C.R.O.S. (Corrosion Resistant Operating System): Chrome plated: Barrel, Gas Block/Tube (billet machined), Gas Plug (billet machined), Gas Piston (billet machined), Bolt Carrier Assembly (one piece billet machined), Silicone Nickel plated A3 Flattop Upper Receiver and Charging Handle. OUR GAS PISTON WEAPON SYSTEMS REQUIRING NO LUBE! Bolt & Carrier: Chrome plated 8620 Integral Keyed, Steel Bolt Carrier (billet machined), heat treated / plated per Mil Spec. Chrome plated Bolt, heat treated, to Mil-spec Upper Receiver: Modular Railed Receiver (MRR). Billet Machined 7075-T6 aircraft aluminum alloy A3 Flattop: Nickel Teflon Plated Charging handle: Nickel Teflon Coated Lower Receiver: P-308, Billet Machined 7075-T6 aircraft aluminum alloy, w/Integral Oversized Trigger Guard AMBI-BOLT Release Lever Machined Into The Lower Receiver Hard coat anodized per Mil Spec and Teflon coated black Timney MFG. Drop-In 4 Lbs Single Stage Trigger Group ERGO Pistol Grip VLTOR "EMOD" 6 Position Retractable Buttstock w/Mil-spec tube Handguards: Ergo ladder rail covers POF-USA: MODULAR RAILED RECEIVER (MRR), Tactical Rail system POF-USA Specifications: All raw materials are manufactured from US Steel Mills. All heat treats, plating/coatings, are completed by U.S.A. owned and operated manufacturers. All accessory and component parts on our weapons systems are from U.S.A. owned and operated manufacturers. All of our weapon systems are 100% pure American made
