Ever wanted to install M4 rail systems on your airsoft AK? Here's one way you can do it and it's now available at Evike.com... "Are you a die-hard AK fan but envy the vast selections of M4 rail systems readily available in the market? Looking to install your favorite M4 M16 free-float RIS on an AK? This adapter is the 'KEY' for you to do so.