<p>UpprRcvrAssm308 16.5″DpFltdBbl11″RailBlk Description Upper Receiver Assembly 308, Black Anodized Gen 4 Barrel: – Length: 16.5″ – Match grade barrels fluted to reduce weight and dissipate heat. – 4150 Mil-B-11595E chromoly alloy. – Corrosion resistant nitride heat-treated 1:10. – POF-USA triple-port muzzle devices. – POF-USA oversized heat-sink barrel nut. – 7.62×51 mm NATO (.308 Winchester) chamber. – E dual-extraction chamber technology (GEN 4 ONLY). Method of Operation: – Semi-auto (P308) rotating bolt, short-stroke gas piston system. – Corrosion resistant nitride heat-treated gas piston system consisting of a single piece gas block, gas plug, gas piston, and operating rod. – Multi-position regulating gas system with normal, suppressed, and bolt-action (off) operating modes. Bolt & Carrier: – Nickel plated bolt carrier with integrated bolt carrier key. – POF-USA roller cam pin with chrome plated stem and NP3 roller. – Chrome plated bolt. Upper Receiver: – POF-USA patented Modular Railed Receiver (M.R.R.) free-floating monolithic rail system. – Billet machined 7075-T6 aircraft aluminum alloy. – 2-piece upper receiver. – Black anodized billet charging handle. – 6.2 lbs – Overall Length: 25″ – 11″ M.R.R. Handguard – POF-USA free-floating modular “M” Rail aluminum handguard. – Two 5-slot and one 12-slot modular rail sections for bottom, sides, or top of “M” Rail. – Black Anodized Manufacturing: – All raw materials, heat-treats, platings/coatings, accessories, and component parts on our weapon systems are made 100% through U.S. owned and operated steel mills and manufacturers.</p>
