Directly descended from the rifles developed by LWRCI to meet the requirements for the U.S. Army Individual Carbine program, the IC-A2 is built for high performance. All IC models are constructed using the highest quality materials, built on our patented self-regulating short-stroke gas piston system, machined from materials that belong to the super alloy family of steel alloys most often used in aerospace, LWRCI raises the bar on reliability and ease of maintenance- delivering the highest level of performance. The gas-piston system can be accessed quickly by loosening two thumb screws.