The Christensen Arms CA-15 Recon is a great modern sporting rifle that gives a lot of value for the price. It runs on a piston system that provides a flawless semi-automatic rate of fire. Both the upper and lower receivers are machined billet for prolonged life and quality. This rifles integral features are a 16" carbon fiber wrapped barrel, machined billet upper and lower receiver, titanium flash suppressor threaded with a ½"x 28 tpi, mil-spec black nitride bolt carrier.