This version of the XM15-E2S carbine has a post front sight/bayonet lug and an adjustable peep sight mounted on the carrying handle. The barrel with muzzle break is free floating inside the aluminum forearm. The left side of the receiver has the standard markings and the upper receiver has the shell deflector and forward assist. Checkered pistol grip, adjustable buttstock, banana magazine and sling swivels (black nylon sling included). Complete with factory plastic case.