A personal favourite for CQB games by a good number of players, Mach Sakai reviews the Tokyo Marui MP5K PDW AEG. This is the MP5K that comes with a simple folding stock that helps in providing a stable shooting platform. It's mainly plastic with metal parts being the front and rear sights. Since it's lightweight and compact, Mach Sakai says its a joy to use and recommends using a larger capacity magazine for airsoft games.

Read the full review here and below is the video version (in Japanese):