Patriot Ordnance Factory Revolution, Semi-automatic Rifle, 308 Win, 16.5 Barrel, 1:10 Twist, Black Finish, Mission First Tactical Furniture, 14.5 M-LOK Rail, Triple Port Muzzle Brake, 4.5lb POF Drop-In Trigger, 1-20Rd PMAG 01235 The Revolution is POF's new .308 rifle that handles like a 5.56. The Revolution features many 5.56 parts; such as charging handle, bolt carrier, cam pin, buffer, heat sink barrel nut, handguard, and 5-position gas piston operating system. The barrel extension, bolt assembly, upper, and lower receiver are the exact same size as those on an AR15.