A blast from the past a Mach Sakai goes back to review the Tokyo Marui Colt M4A1 Carbine AEG. This is doesn't use the recoil shock engine as this set the standard for M4A1 Carbine AEGs in the market as other manufacturers made compatible editions. Mach Sakai agrees that is simple and easy to use in airsoft games.

Read the full review here and below is the video review: