The Aftermath Kirenex is the embodiment of the M4 S-System. Allowing it to have a fully tactical RIS fore grip that flips open to reveal the battery connection and storage with no modification is a huge plus. The LE tube stock locks in three positions with the buffer tube being strictly metal and the stock being compromised of the colored OD poly plastic allowing it to be light and functional. The top mount RIS (Rail Interface System) runs along the length of the gun allowing you to place any optic, where ever and when ever on the gun with ease. The external barrel %100 metal and allows you to house a 363mm internal barrel giving you the accuracy that is needed for those long range shot.  The Kirenex allows you to get a gun that can not be beat in its price bracket and style, with power