POF-USA's Revolution broke barriers and won awards when they released the piston driven revolution. By popular demand, you get the same technology, same durability, same features, and same AR-15 size, but in a smaller direct impingement system featuring POF's 9-position adjustable Dictator gas block and Renegade rail. There is virtually nothing left to upgrade with this rifle. The nitride heat-treated fluted barrel are machined for accuracy and the triple port muzzle brake makes follow up shots much easier and felt recoil much more soft. The tomahawk ambidextrous charging handle is big enough for positive traction, but small enough to stay out of the way. The patented oversized heat sink barrel nut is one of the most significant innovations. At three inches long it completely encompasses the chamber and throat area of the barrel where expanding gas temperatures peak. Take into account the radiation properties of aluminum compared to traditional steel and you have 17 times more heat...