Mach Sakai goes for the new generation AEGs of Tokyo Marui, choosing the Tokyo Marui M4 CQB-R NEG in FDE. This is the AEG that comes with the blowback and recoil engine and uses the SOPMOD battery that is easily installed in the back. According to him, this AEG is easy to handle and hits pretty. This is fun to use especially in airsoft skirmished.
Hyperdouraku writes about the first M4 CQB-R Blowback AEGs from Baton Airsoft. These are basically offerings to meet either the budget or high performance requirements of the airsoft player. For those on a budget, they can go for the Sportline version and those who can afford more can go for the HR (High Rate/High Cycle) version which is highly tuned to be responsive when used in airsoft games.