The POF P308 is a short-stroke piston-operated .308 AR-10 that was one of the earliest premium piston-driven .308 semi-autos available to civilians. It features POF's proprietary E2 extractor and nickel-boron coated components for improved reliability under adverse conditions. Type: Semi-Auto Rifle Action: Short Stroke Piston Caliber: 7.62x51mm Capacity: 20 Year introduced: 2008, USA Weight: 8.1 oz Overall length: 35.5" Status: Active Intended use: Duty, Range, Precision