The LWRCI IC-A2 is a direct descendant form the original rifles which LWRCI submitted and meet the requirements for the US Army Individual Carbine program, quite simply put the IC-A2 is ready to perform. This particular rifle features a short stroke gas piston system allowing the gas system to run cleaner and more efficiently in any environment with any ammo. The IC-A2 is built on the LWRCI Monoforge Upper receiver with the integrated rail base which means it is stronger and lighter than what other manufactures can produce. LWRCI uses the highest quality parts and components in order to build their rifles so you can rest easy that you invested in a quality AR-15 carbine.